Here's the way I see it:
martinho & Co. have fun making Glest 2.0
martinho & Co. push themselves to release Glest 2.0
martinho & Co. release Glest 2.0
martinho & Co. feel good about releasing Glest 2.0
martinho & Co. don't work on Glest 3.0 right away, they are already burned up from the 2.0 release
martinho & Co. take Glest 3.0 calmly for some time(which could be weeks, months, years, decades, centuries, milleniums)
martinho & Co. tell themselves, "you know, it's been some time since I did some work on Glest for fun".
martinho tragically dies... wait... no this isn't what is supposed to happen XD, instead
martinho & Co. work on Glest 3.0
Too much of something wears people out. It's not like the Glest team should work on Glest out of pressure, but because they want to.