What is your favorite or most hated full stack app to support?

So sometimes another team or, if lucky yourself, will build out some automation for a service. These solutions can more-or-less become full stack apps or grow into one. I’ve had tooling made by teams that then disappear and now I’m on the hook for this thing.

What setups do you like? Have you ever been handed something that runs smooth and is easy to maintain? Or do you have tech stacks that are a PITA?

I’m still pretty new to the sysadmin world and am just learning. Most tutorials fail to teach longterm app support and I’d like to learn more.

So far I’ve enjoyed server-less apps - least maintenance imo. Simple cloudfront + lambda@edge + S3 single page app. Otherwise, most my tooling is still little scripts to run as-needed.

What I dislike: Spring boot Anything with Perl Anything with no documentation