Yeah, i agree.

Most of the comments here seem to focus on specific things people were trying to get out of skills, and whether those are still needed.

That is going to vary a lot.

If your goal with something like superpowers was to have a process that made your model work "properly" on tasks, sure that's probably not needed anymore.

If your goal with something like superpowers was to get a consistent set of artifacts alongside what was developed (quality varying, so i mean consistent here as "one design plan, one implementation plan", not "good"), nothing has changed, models do not do this consistently, in a durable fashion, without something telling them to do this.

Yes, for example, newer Opus will often decide to write a spec. But not always, and not with any consistent format or ...

If you want that to happen, you'd still need a skill making it happen.

If you don't care about that, then sure, you don't need the skill anymore.

People seem to have used various skills to achieve different things, and so have wildly different views on what is still necessary.