This is really cool. I'm 30 right now, and only just recently finished my bachelors and have been looking to get a PhD, but it's really hard to find a program that will let you work full time while doing it. It doesn't help that a part of me does sort of feel "too old" to do this sometimes. The PhD system in the US is really tailored around the assumption that you haven't entered the corporate world yet. Anyway, it's…
Professor here. You definitely aren’t too old, but I would never take on a PhD student that wants to continue working elsewhere. A PhD is a full-time job. It took me 6.5 years and was hard enough with very little outside distractions.
Your total justification seems to be that because it was hard for you, it will be hard for others too.
Fwiw my partner got her PhD part-time while working for the university as a researcher and consultant, actively authoring and publishing papers. It took her many years, but mostly it was finishing that was tough.