They have changed a lot of their DLT (not even called that anymore lol, it's Lakeflow Pipelines now I think) syntax. I tried asking ChatGPT to convert a very simple Python one to Spark SQL, and it gave me a bunch of outdated SQL syntax.

Aside from that, if you use their Python connector package, it's a shit show to put it mildly. For example, 15.4 works with serverless but tells you (via deprecation warning) it doesn't and that you need to use 15.1 (which lacks a lot of variant stuff). So then you decide screw it I'm gonna just update to 16, except that serverless (which works on 15.4) doesn't work on 16.0 or 17.0.