As long as you don't use an immigration office for anything, then there's no reason to worry (in practice anyway). No one is "arrested" for not doing a 90 day report and no one is prevented from entering or leaving the country for not doing one.
BTW the e-visa system isn't the place to go to check when the transition takes place. It's best still to communicate with the embassy or consulate of your choice including following their Facebook page / website.
For Taiwan (Chinese Taipei according to the e-visa website) there's no word on the date the transition takes place. It simply says you have to apply at the mission in person.
I suspect Laos is going to be next. They'll probably transition to the e-visa system late November or December too. Just a hunch. Unlike Taipei, whenever Laos does transition, I don't expect them to announce it this far in advance. I think they'll give us only a week's notice, if that.
No, they won't. You can apply from wherever you want (except for a small number of missions that require you to be a resident). However, I agree with you that they may make the process more cumbersome.
I recently had my e-visa application delayed because I didn't input my middle name. The processing time reset, so in the end I had to get a visa on arrival (luckily i was flying in, as they don't process visa on arrival for land based entries). My e-visa came through a day or two later, but was utterly useless by then. I was already in the country on a visa on arrival.
That's most unusual. The Vietnam e-visa system does not process applicants who forget to put their middle name in the system. They will ask you to fix the mistake and then it will take at least another 3 days before the visa is issued.
Now if you're talking about a visa issued at a consulate (this is generally no longer done since the end of Covid) that would be a different story.
Sort of, but in a way, no. Tourist visa holders are occasionally denied entry for staying too long in the country, but with the DTV there isn't really going to be a "you've stayed in Thailand too long" because this visa type is specifically designed for those who want to spend long periods in the country, with some travel in between.