dafman:
he will still be very much there, tweeting away daily, appealing to his base regularly on TV
And in that respect he will be following the methodology (but clearly not the values) of Obama.
Obama is the first president I can remember who has broken the unspoken convention that past presidents stay out of public politics and don't criticise current presidents.
Obama broke that convention by maintaining a public political profile and criticising Trump (albeit sub-textually most of the time).
Don't get me wrong, I'm a fan of Obama. I understand that Trump would motivate breaking of conventions, and Trump was happy to lay into Obama (also something sitting presidents don't usually do).
But now that Obama has broken that convention, it's probably broken for good.