What technology are you currently using that you swore you'd never use?

We've all been there as opinionated programmers. I was married to Sublime for a while and said I'd never switch to Atom or VSCode. Whether it was an appeal towards efficiency or aesthetics, I stood staunch despite seeing countless articles on Medium about dev's switching to VSCode.

And a few days ago, I finally started making the transition to VSCode.

This isn't the first piece of technology or software that I previously denounced, and now crawl back to half hearted apologies and open arms.

What kind of software have you scoffed at only to end up diving deep into their docs weeks or months later?