I contend that tabis are constantly purchased for various reasons yet...
They'll be built even in games where the only source of AD is the ADC. Sure it's easy to say Tabis are too good and they're too good because ADCs, more specifically, anything AD, is very strong and tabis are a cheap, cost-efficient source at greatly reducing that. You know what my problem with that is? What does that say about merc treads in a day and age where CC is in every single champions kit galore?
I don't think mercs are exclusively bad, but clearly they aren't too highly regarded because people still build tabi over mercs even though mercs would seemingly be the correct choice. It's not because mercs suck, it's because CC stacking in this game is fucking ridiculous and mercs feel shitty for reducing crowd control, even when that's what they're intended for. You can't buff them because then they'd be too good. Cc overlapping is a problem and it needs to be changed somehow because there was once a time everything and its mom didn't have CC and kiting/perma rooting something required dedicated comps. Now it's just your average game.
Tl;dr Hard CC effects need to have some sort of reduced stacking mechanism that actually doesn't feel like shit, aka mercs feel like shit. Honestly, I find myself buying mercs more for the MR at this point...
Does not have built in true damage,
however, does. (FTFY)
maybe? Also, death recap is full of bugs and inaccurate information (sadly, idk why riot hasn't fixed that up nice and good, it's been bad for the entire history of the game, I honestly can't fathom why it would be hard to fix it either, and it's not like they haven't put some work into making it better). If you really wanna know what a champion does, check 