Scarf Nihilego
I'd argue that I did provide evidence. Steels are a staple of the meta and being walled by every one of them (bar like, Skarmory) is plenty of reason to keep it out of A-. Every offensive mon in the A ranks can either hit steels SEffectively/Neutrally with their STABs (CharY/A-Gren for instance) or have a strong coverage move to break through them (Megagross, Autotomize Celesteela, Mega-Pinsir).
vsomani
Spikes wears down anything grounded, saying that they should be a reason for Nihilego's rise because they wear down steels is ridiculous.
Serperior has multiple different sets (SubLeech, Offensive sweeper, and also scarf has gained popularity) and really doesn't have 4MSS at all. All it requires is Leaf Storm + HP Fire, the rest is just dependent on the set. Sure, it'd like to run more, but that holds true for basically every poke in existence. That's not 4MSS. Gyara is doing just fine. Being able to set up on defensive Lando T (and offensive sets running Fly over Stone Edge) is super nice and always has been and the drop in Fini's effectiveness just helps it since it can save its z move for another target. It's not like Lando/Fini is the only core it deals well with. After reading your baton pass comment I'm pretty sure you're just talking out of your ass. BP is doing fine and just got a little better with Medicham.
Nihilego really does only do one thing: It revenge kills as a scarfer. Specs is ok, I guess, but stuff like specs Keldeo exists with a better speed tier and STAB combo. It's primary role in the meta is scarfing, and there are several alternatives for that. Meanwhile, only Scoli can speed pass (viably, anyway) and only Gyara can function as a DD moxie sweeper (what's salamence) with a near perfect neutral STAB combo (what's rotom-w).
The other pokes you added aren't great examples either. CharX is being discussed for a drop, Bulu should drop, and Skarmory only sees use on stall.
lol spikes wear down steels
I'd argue that I did provide evidence. Steels are a staple of the meta and being walled by every one of them (bar like, Skarmory) is plenty of reason to keep it out of A-. Every offensive mon in the A ranks can either hit steels SEffectively/Neutrally with their STABs (CharY/A-Gren for instance) or have a strong coverage move to break through them (Megagross, Autotomize Celesteela, Mega-Pinsir).
vsomani
Spikes wears down anything grounded, saying that they should be a reason for Nihilego's rise because they wear down steels is ridiculous.
Serperior has multiple different sets (SubLeech, Offensive sweeper, and also scarf has gained popularity) and really doesn't have 4MSS at all. All it requires is Leaf Storm + HP Fire, the rest is just dependent on the set. Sure, it'd like to run more, but that holds true for basically every poke in existence. That's not 4MSS. Gyara is doing just fine. Being able to set up on defensive Lando T (and offensive sets running Fly over Stone Edge) is super nice and always has been and the drop in Fini's effectiveness just helps it since it can save its z move for another target. It's not like Lando/Fini is the only core it deals well with. After reading your baton pass comment I'm pretty sure you're just talking out of your ass. BP is doing fine and just got a little better with Medicham.
Nihilego really does only do one thing: It revenge kills as a scarfer. Specs is ok, I guess, but stuff like specs Keldeo exists with a better speed tier and STAB combo. It's primary role in the meta is scarfing, and there are several alternatives for that. Meanwhile, only Scoli can speed pass (viably, anyway) and only Gyara can function as a DD moxie sweeper (what's salamence) with a near perfect neutral STAB combo (what's rotom-w).
The other pokes you added aren't great examples either. CharX is being discussed for a drop, Bulu should drop, and Skarmory only sees use on stall.
lol spikes wear down steels