User blog comment:Hyxaru/Rylia's needs a 'hextech-spellvamp removal' treatment/@comment-5035765-20160711015142

the difference here is that Rylai's slow is nowhere near as "niche but OP on those specific champs" as spellvamp was.

there was like... only a couple champs who used spellvamp (like, Vlad and Kat... maybe Rumble or an Akali who's feeling fresh?), but on most of those, getting spellvamp meant they could stay in lane FOREVER, making it core... (and on anyone else, it just was not worth the money).

ON THE OTHER HAND, Rylai's is useful on a laaarge amount of champs (many many APs), and it's not USELESS on the champs who don't have it as core (unless you're building it on an AD champion, but that's more on you than any problem of the game's).

Also, do note that most of the champs that you list Rylai's as being OP on are A) Mana dependant B) Skillshot dependant and/or C) immobile... it's literally a case of "Git Gud"