FYI... this appeared on a forum today about the ease of using the New TDAC Arrival Card
"Sharing my experience in case others are worried.
My arrival in Thailand is scheduled for May 1st. Initial concerns regarding the Thailand Digital Arrival Card (TDAC) application proved unfounded. The process was completed in under five minutes; the application was simple and straightforward. The email confirmation/QR code were received immediately, with a convenient download option also provided after submission. The entire experience was seamless and straightforward."