I agree with Joka's point, and Ike's TL;DR. I'm all for a glitchless category, as long as it is sufficiently different from other runs. Just adding a glitchless category would essentially be a "Most Skills" category as it is right now, with no key dupe, and add in Horu. Those two things aren't enough in my mind to make it a category worth running. If we change All skills to allow OOB, and have glitchless as the "starter" run that people can do if the glitches are intimidating (like how many of us started), then that differentiates the runs enough to have them both worth running separately.

I think we all agree that we want to keep at least one category that can't make use of the Sunstone -> Warmth skip, that's essentially why All Skills No OOB was created. Adding glitchless and changing ASNOOB (rip acronym) will keep the spirit of ASNOOB in glitchless, but unshackle ASNOOB from the arbitrary rules added to it. If we have All Cells (OOB is fine), why should we have All Skills No OOB?

Edit: Also, Glitchless is definitely an arbitrary category, but that doesn't mean we shouldn't add it. A lot of games have a glitchless run, and the way they make it less arbitrary is by clearly defining what is and isn't a glitch. So, as long as we define (and update as new tech is found) what is allowed then there shouldn't be any dispute about whether any particular run is allowed or not. Also, by removing No OOB from All Skills, glitchless would be the only arbitrary run.