Are generator perks still viable?

1 is pretty good but I wouldn't go above that but that's just me

I sometimes run 0 but that requires....cutting some corners and running Rancor.

Pop goes the weasel is best

I mean, what exactly do you mean? Killer Regression Perks or Survivor Progression Perks?

Killer Regression Perks are viable, you are fine with equipping one or two or you can go the easy route and use four. Which one depends on the Killer you are playing and the rest of your build, e.g. on Killers who need to break Pallets I prefer Brutal Strength and therefore like to use PGTW over Pain Res.

Gen Progression Perks in general are not viable aside from Deja Vu (plus Resilience, but I would not really count that as a strict progression Perk, since I think it is mostly taken for the vault speed). The rest is pretty bad, mainly because their numbers are too low or they require to play in a suboptimal way due to activation conditions (e.g. Prove Thyself requires you to work with another Survivor, which overall slows down Gen Progress. And something like Overzealous lets you spend more time cleansing a Totem than you would realistically get out of the Perk).

You dont even have to be good at great skill checks because stake out exists.

I use this combo sometimes, it's pretty good but pretty stressful if you're a bit of a boomer like me and struggle as the skill checks get more and more frequent/difficult.

Not to mention the pressure when someone comes and joins the gen you're on while you're multiple stacks deep, knowing it's only a matter of time before you miss and they leave in disgust.