For those thinking about applying for the DTV in Taiwan, here is an up to date statement (received 5min ago).
The link in there is the one you probably already know if you researched Taiwan:
[members only]
So it's still a walk-in, no appointment kind of thing. π
TLDR : Answer Summary
The latest information on applying for the Destination Thailand Visa (DTV) in Taiwan indicates that it remains a walk-in process without the need for an appointment. Applicants are referred to the Thai embassy's website for more details. There are discussions regarding the use of a sponsor letter instead of showing 500,000 baht and confirmation that visas can be issued on the same day. Additionally, applicants are advised on bank statement requirements, emphasizing the need for an English version or a self-translation stamped by the bank.
DTV VISA RESOURCES / SERVICES