It maybe need a 2 years of abandonment before a divorce can be issued... the thai law follows very much the UK law. You cannot prove he is dead or of ill repute... if you cannot find him. And would think you would have to serve papers on him I'd you wanted a quickie.
But it has just started to go up again in the North East above factor 1. South Korean has just started a 2and wave. Let hold on yet before we say it has all gone.