Yes, long as there is progression (something that's easy on the 'other stuff' , joints, tendons, neural, etc.) should cause a small bump in PS every day skewing the trend towards hypertrophy over just flat line.
Gymnasts - True, they don't have actual progressive loads. I think we know for sure now that tension is a factor in the equation, not THE prime driver, but it can be used as the primary factor, or as a lesser factor. Such as 20 seconds with 100 lbs is progressive over 15 seconds with 100 lbs. And 110 lbs for 20 seconds is progressive over 100 lbs for 20 seconds. But we also know from all those studies comparing RM's with equal hypertrophy that for example (random numbers for illustration..) 20 seconds with 100 might be equal to 120 lbs for 15 seconds even though the latter had a higher load, the exposure was shorter so it evens out.