Password-reset queries made up 38% of one support RAG bot's vector lookups, says a dev.to write-up that moves retrieval behind an HTTP cache. Any saving depends on identical queries repeating within one tenant inside five minutes.
Reality
- Evidence35
- Adoption
- Insufficient
- Hype gap+30
- Incentives70
- Confidence40
A dev.to walkthrough replaces a managed vector store and a hosted embedding API with sqlite-vec and a local model on port 11434. Its schema declares float[768], so changing model dimension means re-embedding everything.
Reality
- Evidence42
- Adoption
- Insufficient
- Hype gap+25
- Incentives22
- Confidence48
A dev.to post argues that moving embeddings out of Postgres buys a second source of truth, a four-leg query path and 50 to 150 ms of internet latency. Its 8 ms pgvector counter-figure has no benchmark behind it.
Reality
- Evidence24
- Adoption
- Insufficient
- Hype gap+55
- Incentives55
- Confidence45
A September 2026 comparison pins the workload at 10 million 1536-dimension vectors and reports Qdrant between $250 and $947 a month, while Pinecone's serverless bill is set by the gigabytes each query scans.
Reality
- Evidence38
- Adoption
- Insufficient
- Hype gap+24
- Incentives62
- Confidence52
A dev.to design guide moves JSON documents and vector search into one PostgreSQL instance, and the evidence it offers is operational: deleted ETL pipelines and sync bugs, with no query timings on either side.
Reality
- Evidence35
- Adoption
- Insufficient
- Hype gap+30
- Incentives20
- Confidence55
Mem0-style memory replaces embed-and-store with extraction, write-time retrieval, an ADD/UPDATE/DELETE/NOOP decision and consolidation. The similarity scores in the dev.to writeup show why no threshold can make that call for you.
Reality
- Evidence35
- Adoption
- Insufficient
- Hype gap+22
- Incentives30
- Confidence55
A consultant's two client failures, a supplier filter and a 10kg shipping quote, both broke on a numeric comparison that top-k similarity does not perform.
Reality
- Evidence32
- Adoption24
- Hype gap+14
- Incentives42
- Confidence46
A practitioner's account of a healthcare pipeline puts the dominant cost in orchestration, not inference. His own numbers say the rate limit and the SLA are queueing problems, not capacity ones.
Reality
- Evidence20
- Adoption10
- Hype gap+55
- Incentives
- Insufficient
- Confidence58
A dev.to post argues the layers arrived before the problems. Its strongest evidence, grep beating an embedding pipeline, comes with no name and no numbers, which is the part worth testing yourself.
Reality
- Evidence24
- Adoption
- Insufficient
- Hype gap+22
- Incentives
- Insufficient
- Confidence32
A dev.to writeup drops vector stores for a SQLite table with tag and timestamp columns. Its own numbers put the practical ceiling at a million rows, not a hundred million.
Reality
- Evidence24
- Adoption
- Insufficient
- Hype gap+42
- Incentives
- Insufficient
- Confidence33
A dev.to account of retiring Mongo, Redis, Elasticsearch and a vector store makes its strongest argument on consistency rather than cost, and it arrives without a single figure.
Reality
- Evidence24
- Adoption34
- Hype gap+46
- Incentives62
- Confidence30
A dev.to writeup argues tuned SQLite replaces pgvector or Pinecone on a $5 VPS. The connection discipline is the real lesson; the headline count of millions of vectors is not evidenced.
Reality
- Evidence24
- Adoption8
- Hype gap+62
- Incentives68
- Confidence34
Vector search ranks by meaning, so literal tokens like part numbers and ticket IDs fall just outside the top results. The fix is lexical plus dense retrieval, not a model upgrade.
Reality
- Evidence44
- Adoption58
- Hype gap+8
- Incentives38
- Confidence52
A dev.to writeup drops LangChain, LlamaIndex, hosted vector stores and the cloud model, leaving six files, seven npm packages, and one cloud dependency still in place.
Reality
- Evidence41
- Adoption9
- Hype gap+14
- Incentives31
- Confidence34
HNSW indexing runs inside the SQL engine, so there is no second service and no network hop. There is also no index persistence unless you turn on an experimental flag.
Reality
- Evidence58
- Adoption
- Insufficient
- Hype gap+12
- Incentives
- Insufficient
- Confidence52