Software development topics I've changed my mind on

> Monoliths remain pretty good

> It's very hard to beat decades of RDBMS research and improvements

> Micro-services require justification (they've increasingly just become assumed)

That is so true. I am still deploying good old .war files to full blown Java app servers backed by simple SQL databases (all clustered and stuff) with some handwritten cli tools and a Jenkins server. Shit is fast, shit scales, shit just works. It is a pleasure to work with

98% of teams I've worked on did not need microservices.

20+ years as a professional developer and I still have to argue with coworkers on why MongoDb is a terrible fit for their data, which is clearly relational, just because said coworkers can't be bothered to learn SQL.