We don't know what the future requirements to get a Non-immigration O visa will be after the lockdown is over. However, you CAN get that visa in your home country, *AND* you can also get that visa *INSIDE* Thailand :O, and then get an extension of stay based on being over 50.
You may also be able to get that visa in Laos/ Cambodia/ or Malaysia as well, but at this point, we don't know
You can find more information out about various types of "retirement visas" from this post, written by Tod Daniels:
********************************************************************************************
**********
**********
*****
*****
*****
3/permalink/
*****
*****
*****
9/?hc_location=ufi