Den. Super Star x Ise 'Pearl'

[Donald]

Everyone. I've had a Den. Super Star x Ise 'Pearl' for the past three years that is happy as a clam. It just got through blooming for the second time, once in August and also in January. It has two keikis on it and a large growth of new roots. The mix it is in is not stale and my question is whether to repot this now or let it be. I know that "Dens" like to be root bound but this fellow looks quite content in its current home.
Thank you to all that respond, and have a grand weekend.
Donald in "balmy" Massachusetts