I did have ulcerative colitis from ages 9-29, 20 years. I have had my J pouch since age 29 and I am now 58, so exactly half of my life. The majority of that time I have had to treat pouchitis, albeit mostly successfully.
However, rectal bleeding and ulcers are issues I have never really had. My cuff is mostly in good shape, but due to the dysplasia in my colon pre-colectomy and my 25 plus years of pouchitis, they scope and biopsy my cuff and pouch every year. In fact with my dilations I am going to be scoped around 4 times this year.
And yes despite these issues, I am way better than I was during the 20 years I had UC. I feel like I traded up in diseases, and I take that trade any time.