For a non-Go player, do you think this trend will persist, or is it more of a dead-cat/human bounce?
This in no way detracts from how absurd and remarkable it is that Shin Jinseo can beat KataGo (it gets a LOT of training and architecture refinements https://katagotraining.org/#eloGraphButtons) with 2 stones of handicap.
A 2 stone handicap, however, does not scale linearly with strength. It becomes relatively more impactful at higher levels. For pro players, 2 stones are gigantic, and for beginner players, they make zero difference. Same for a point advantage (komi adjustment). So there might come a point where it is physically impossible for a computer to beat a top human under some handicap.