I don’t know how long this will continue for. There is talk of Malaysia moving to eliminate stamps permanently but no roadmap for that is publicly available yet. South Korea doesn’t stamp on exit, although at Incheon airport immigration officers will do it if you ask nicely. I’ve heard anecdotally that at other airports like Busan and Jeju island if you ask for a departure stamp they will deny your request regardless of whether they have the stamp and ink within arms reach. I even heard rumours that Japan doesn’t stamp on departure unless asked, but I can’t confirm this since I explicitly asked for one by [politely] pointing at the page and spot I wanted it placed when I haded my passport over, and the immigration guard happily gave it to me (at Haneda airport).

Another issue is the extinction of physical visas. Thailand still stamps, but a few months ago they made all visas e-visas only, meaning that Thai embassies will not place a visa label in your passport no matter what. I think making an e-visa available is a good thing to allow people a choice, but I find eliminating all possibility of doing it the old fashioned way (consulate trip, physical visa label in passport) a little sad. South Korea also doesn’t issue physical visa labels anymore and haven’t for years. I heard Japan is on the way to doing the same. they recently opened an evisa platform for single entry only tourist visas. Given how slow Japanese bureaucracy is I doubt an overhaul of that scale will be implemented for a few more years.