Quite interesting.
I think for skaters who were raised/started their Senior careers under 6.0 it would become harder to adapt to IJS. Plushenko won an Olympic silver medal with a pair of programs that wouldn't even get a second glance today. Yagudin won Olympic gold with a footwork sequence that was considered difficult and advanced at the time, but wouldn't even get a level 1 now, probably, for example.
A lot depends on the attitude of the skater too.
I actually like watching programs without commentary, or only with certain countries' commentators. The Russians and several other European channels tend to be quite quiet during a program (which I like) but North American commentators (US and Canada) annoy the absolute crap out of me by talking incessantly, mentioning useless/pointless trivia, making snide comments about a certain skater, or comparing them to other skaters.