[cheriot]

> I don’t agree with the blanket advice of “just use Postgres.”

I take it as meaning use Postgres until there's a reason not to. ie build for the scale / growth rate you have not "how will this handle the 100 million users I dream of." A simpler tech stack will be simpler to iterate on.

[quotemstr]

Yes. That's a good framing. PostgreSQL is a good default for online LOB-y things. There are all sorts of reasons to use something other than PostgreSQL, but raw performance at scale becomes such a reason later than you think.

Cloud providers will rent you enormous beasts of machines that, while expensive, will remain cheaper than rewriting for a migration for a long time.

[pclmulqdq]

Postgres on modern hardware can likely service 100 million users unless you are doing something data intensive with them.

You can get a few hundred TB of flash in one box these days. You need to average over 1 MB of database data per user to get over 100 TB with only 100 million users. Even then, you can mostly just shard your DB.

[direwolf20]

What about throughput? How many times can postgres commit per second on NVMe flash?