I arrived on a TR visa from Canada in November and have applied for and gotten the 30 day extension till the first of February. I will be flying to Vientiane on that date and returning the following day and get the Visa exempt 45 days and then 30 day extension. I thought that you had to fly out of the country and return to get the Visa exempt 45 days and that doing just a land crossing that you would only get 15 days?
TLDR : Answer Summary
The Visa exempt entry for Thailand currently allows for 45 days of stay regardless of the means of entry. As of April 1st, the exemption will revert to a 30-day limit. Previously, there was a distinction in the duration permitted for land entries (15 days) versus air entries (30 or 45 days), but these rules have changed. However, it's important to note that visa-exempt arrivals can only make two land re-entries each calendar year.