I do still have trouble with stairs and I’m 2.5 years post op. Going up is better, but I need a handrail for sure, and a cane also helps, though I don’t use it anymore. I can only come down foot over foot if the step is really short.
Like you, I don’t have stairs at home and I hardly ever encounter them anywhere I go. My son has a second floor condo, so there’s a full flight there, but he lives more than an hour away, so I’m not there often.
I haven’t had a good outcome in general, from my Patellofemoral partial, so I’m sure that’s why I can’t do stairs at this point. However, in spite of my poor outcome, I have seen certain improvements in my second year post op, and still some now in my third year post op. Improvement was very slow in the first year.
So, you will most likely continue to improve.