@Stuart ********
Well, there seems to be quite a few things you're not up to date on.
Back around 2017-18, Thailand added Hong Kong and Singaporean passports to the autogate approved nationalities when entering by air through Suvarnabhumi airport and provided they arrive on 30 day visa waivers as part of a trial. I haven't heard of other nationalities being added since, though the plan is to eventually allow just that. Perhaps things were disrupted by Covid, though that isn't really an excuse, considering Thailand apparently managed to rollout e-visas in 2021, which was during Covid.
Laos for its part greatly improved the old temporary vehicle entry procedure during Covid, which was rolled out immediately following their reopening last year. Thailand by contrast did nothing; the old TM
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/4 forms and the separate 1 page customs form are all still used. They're fine, but the procedure is too slow. Moreover, TM3 and TM4 are largely the same thing, and you have to fill out everything in duplicate! So 8 sheets of paper (TM2 is double sided and requires a signature on the back).