> We’re going to put everything in a single file on disk again.
For most small scale projects I'm just reading and writing lines to a file on disk. Sure, I could over-engineer some database, or I could get a minimal viable project off of the ground and worry about scaling later. Most projects run into issues long before scalability.
I found myself recently wanting a lightweight key-value store for random structures. For this purpose, I created a toy single-file key-value store [1] in less than 256 lines of C. It's not quite ready for prime time, but it's incredibly easy to use.