Handy is exactly right, although he might have even overstated the chances of Biden going after them. It would be a huge blunder for Biden to do what you want.
Do you think Joe Biden wants his entire first term to be about Donald Trump? Can you imagine the circus involved with prosecuting Trump and his cabinet? Biden could solve global warming, personally develop a vaccine for Covid and see a 100% increase in the stock market, and no one would notice because of the circus you want to put on.
No chance they make that blunder. There will be idiots in Congress who want to do it, but Pelosi and the rest won't let it happen.
Also, you have to remember that Presidents are a very exclusive club, and for better or worse, Trump is in that club. Do you think Joe Biden wants to establish a precedent of the successor President going after his predecessor and his cabinet? Nope.
So the precedent you would like to establish is that it is totally ok for GOP Presidents and their cabinets to commit treason without consequence? Yeah that sounds way better than holding people accountable for their crimes. Party of law and order...