Yeah Lemmy got much better with v0.19, while Kbin has barely improved visibly at all it seems so I just gave up on it for now.

I still suffer the issue, on both mobile and desktop browser, that literally every time I come back, to pretty much anywhere I have to login again - I cleared cookies a few times but that didn't seem to help. Most instances seem to have that, though I may have an odd selection of them (Kbin, Discus.Online, and StarTrek.website), and there are the occasional days where I have to attempt to make every comment at least twice for it to stick (but at least now if it doesn't go through, you notice, unlike previously where it disappeared into the void invisibly, though I only had Kbin experience back then).

I haven't bothered to research the apps yet - security, stability, ads vs. no, etc. - so all that I'm saying is for the vanilla browsing experience.

Also people report that the creation of new accounts from the mobile browser is barely if at all functional. I haven't tried that myself, but it does seem like the experience varies enormously depending on which method of interface someone is using - and that's going to be off-putting to a migration event, like if something doesn't work it would be better to put up a sign saying "this (often?) doesn't work on a mobile, just go to a desktop computer for this task". Caveat: assuming the desire is to bring in more people who are less technically minded, for the sake of e.g. content creation.

And this doesn't even begin to cover the modding concerns:-).