if you do the maths the very last bitcoin will be mined in approx, the year 2140.
At the 2032 ish halving the overall supply will be 99.21% mined. That's almost all enough for me. In less than ten years it'll be 98.5%.
It's easy to let mining slip to the back of one's mind. There's been a veritable torrent of coins arriving for many years and that's going to dwindle rapidly. It'll be very interesting to observe the effects as the production levels are something we've gotten totally used to.
Let's hope that fee market is good and strong by then.
It doesn't, and it probably won't be. Mining is destined to fade. The writing is on the wall (actually in the code) and those large miners who don't shrink now, will go bankrupt. You are going to get less bitcoin, and fees will remain low, even lower now with LN.
There will be miners, just not as many. Hashrate will plummet, and difficulty with it, at the same time the asics are very efficient but they won't be profitable on most places, and as time passes they won't be profitable anywhere, and even asic production will fall.
This goes tied to the bitcoin production, because its logarithmic as you correctly noticed, in less than 10 years most the mining profits will be gone.
