[user104658]

Originally Posted by Strictly Jake

David will always be my favourite and I wish he didn't get such a boring ending stuck with Donna for the rest of his life...poor sod....

I'm a bit baffled by the plan so far - they did a whole big thing about how he needed to just stay put for a while to get his bearings... but, he kept the Tardis and at the end it's mentioned he's already whizzed people off to New York and... err... Mars. Maybe the idea is just that he won't get involved in any drama?

However...

...they made a whole big deal about how he hasn't stopped since he took off in the Tardis.

...Except it isn't true. He did it TWICE as the 12th Doctor (Capaldi). He spent 24 years on Darillium with River Song, and he spent several decades in Bristol as a University professor guarding Missy's prison. In the second case, you could argue that he was technically "on the clock" guarding The Master, but it seems that not much happened at all in those decades. He was pretty settled teaching at the University. Though I guess he was more or less alone. Still even if you discount that one - with River Song he presumably spent 24 years drinking wine and having Netflix and Chill with his wife? How long is he going to be with Donna on Earth that's longer.

RTD retconning IMO. I don't mind it, necessarily, but it would have been easily enough avoided as a plot hole if they'd just quoted the things that have happened post-River Song (including her death).