The whole "let Bryce walk" move has immediately been both successful and satisfying from the DC side of things. We won a title immediately, and he's tried so hard to be MR PHILLY but it's clear the entire organization there is a dumpster fire. So, not only has he gone from baseball superstar to middling good player on a bad team, but he's unhappy, he's missing the playoffs annually, and he's watching us be successful.
He's 2 years into a 13-year contract, and he's only turning 28 next month. There's a lot of time left to see how his contract plays out.
That said, Arrieta's contract is gone now, McCutchen is gone after next year. They're still paying Odubel Herrera $10M next year (yikes). They obviously still have the money to pay Realmuto, but the greater question is why he would want to stay. If he leaves, that's a pretty patchy team next year without substantial upgrades that don't seem to be out there this winter. Not much money on the books, but not a ton of difference-making talent either outside the two starters, and looks more like a rebuild hoping to go into '22 with Harper/Wheeler/Nola/Segura all around. Everything there looks like a .500-ish team, with even a return of Realmuto moving them a few games above rather than under, unless and until they figure something else out.