I dunno man. People have been saying that about ROT for a little while now. That ROT is the new LOT and so on. But if you look around the league, the premier OTs are always on the left. Nothing really has changed over the last few years yet over the last few years you keep hearing it has changed.
It just could be that Lane Johnson can’t play left OT the way you need it to be played. That he’s an ideal ROT but not athletic/nifty enough to play LOT?
Or the Eagles just do things differently.
I don’t see a trend, honestly.