The idea behind the "establishment's" treatment protocol, is to save more aggressive treatments for time when lesser ones are not working or no longer effective. Temador is effective for some, when it isn't, something else is tried. Unfortunately, there isn't a clear path how any one's person journey will proceed, as everyone seems to be a bit different. I would suggest you try not to focus on when the the other proverbial shoe will drop as recurrence rates are high, that is easier said than done. There are many long term survivor's out there with GBM, stay hopeful!
Dodger