For people using Resolve, would you recommend someone already quite well-versed in KDenLive to switch, for some non-profit work on cutting together educational content with some animations, some talks etc?

Will it allow me to drastically improve my workflow (save time for some tedious tasks), increase quality of the outputs etc?

If you're organizing/having hundreds of clips you want to put together, or overall want a more opinionated workflow, then I'd say give it a try at least, the free version doubles as a trial :)

I'm a Premiere migrant to Resolve (Studio) some years ago, biggest hurdle is the opinionated workflow, it basically wants you to use the tabs in the bottom to go from "Media > Cut > Edit > Color > Fusion > Audio > Deliver" (simplified) so different tools available in different areas, made for different use cases, but in general once you've learnt the overall and high-level concepts, it makes editing really easy and smooth.

Besides, it's probably the most stable video editor that runs natively on Linux since ever, I think I've had it crash once, and the Fusion 3D text doesn't work properly for me, but besides that, runs like a dream and UX is miles ahead anything else available.

Resolve was a much better experience for me than kdenlive. But you can easily try it out for yourself because most of it is completely free (in fact you probably won't ever need the paid features for what you do)

I'm no expert (relatively new to the field myself), but I was trying to put together some simple videos with animations in Final Cut Pro and decided to try DaVinci Resolve, and I'm glad I did. The Fusion stuff bundled into it is incredibly powerful for animations.

It does take some getting used to, but the amount of tutorial content on YouTube is another reason I'm happy I made the switch. A lot of really good stuff on there. (Search on 'DaVinci Resolve Fusion' to see some examples of it in action if you want to get a feel).