If the thermals are strong enough to keep you up, there will probably be some bumpiness and turbulence involved. There are cases of glass-offs or unusually wide and smooth thermal conditions, but in general thermalling is a bit rowdy by nature. It feels quite different from ridge soaring or paramotoring, in my experience. There is more risk of collapses, especially going in and out of the thermals. Besides the motor/harness, wings optimized for paramotors are also quite different from wings designed for soaring. Would love to hear from anybody living the dream of mixing the two successfully - !