There's a lot of factors involved. It's looking like most businesses should be back in operation by July 1 as things reopen in several stages.
The problems will be, what requirements are put in place for travel. Even if flights resume, testing will be required, maybe even vaccination. People's fear will mean they mostly holiday locally
If a quarantine is required at either or both the holiday destination and on return home, then this will effectively kill international tourism. Only those staying longer term will find it worth the hassle.
The tourist towns are suffering so much right now and I can't see tourists returning in large numbers any time soon.
Also, people in general have spent their savings during lock down so probably aren't going to plan an overseas trip right away.
So is the 26 March date the cutoff for when you started the visa or exemption or for when it expires?
I left and re entered Thailand on 15 March was given 30day visa exemption as an Aussie which expires on the 13th. Was going to extend that but now I can wait until the 30th? Very hard to get to immigration now from Ao Nang as the whole town is locked off now and we cannot leave.