If/while you still can, you might as well just walk (or take a bus, they're great)! London is a beautiful city, with myriad hidden wonders that you just don't find unless you're on foot.
I've found myself in countless situations where the walk is maybe 10-15 mins longer than any available public transport (Uber included), so I've saved myself the money and taken a hit on a little bit of time.
You're looking at roughly twice the cost, usually more if it's late on a Friday/Saturday night. I used to regularly travel from Zone 1 to just inside the M25 to the West of London ─ an Uber costs ~£40, whereas I've paid between £80 and £120 for other private hires for similar journeys.
I'd hate to fall foul of confirmation bias here, but as someone who regularly drives in London, some of the worst driving I've witnessed has been by Addison Lee cabs.
100% agree on this. Whenever I've started to feel the onset of burnout, it's been at times when I felt I couldn't "just leave" at 5.30, for some misplaced sense of responsibility. It's that looming sense of 'you're here until it's done' that fills me (and presumably other developers) with dread.
I think you're operating under a false assumption that everyone in this discussion gains their sense of being appreciated directly from their income.
I strongly disagree with this viewpoint - you can throw as much money as you want at someone, and it might stop them complaining for a bit, but it's not fixing the problem. You can't stop arterial bleeding by wrapping more bandages around the wound.