Aah - the Brexit Thing - makes a change from the CV19 Thing - although for some pps here the two become conflated into an inflated anti-BJ, Brexit, Tory CV19 Balloon.
Probably he'd like to move on early in 2021 as why not? ASFAIK being PM isn't a job for life and pretty much his election 'ticket' was getting Brexit done. Not necessarily involving a global pandemic too.
It's well known BJ prefers a Brexit Deal but really, no one knows right now what will be the Brexit outcome do they? I know Barnier does a Press Conf after each round of negs, and quite unsurprisingly, always finds the UK at fault in any lack of progress because, well, "he would say that wouldn't he"?
Usually in French if a Journo asks a post-statement question in English - which does amuse me.
For a Scholarship Boy that was a bit of a geek, a mentally unstable mother, philandering father and possible speech impediments - da boy done good really - and if he wants to go live amongst rocks, as the OP suggested, why shouldn't he.