+1 for this. Keeps all of my characters nice and tidy. Whenever you level up, you pick your new abilities from a list of options, and then it’ll autofill that into your character sheet. It won’t autofill your spells, though, so I use a different app for that. The only downside is that some of the abilities for certain classes aren’t named correctly, I assume due to copyright issues. But the names are pretty clear what they’re referencing (example: Agonizing Blast = Potent Cantrip).
Maybe not the actual biggest, but the loss of pirated material that i feel the most sad about is The Trove. The Trove was a website with a huge list of downloadable PDFs of source books for tabletop RPGs. I got the pdfs for everything DND, and also tried a bunch of other games I’d never heard of with a few friends. It also had downloads for other books and documents but I only used it for RPGs. I think it went down in 2019 or so.