As we don't vote or go 'with it w/o reason' (Adrian's rules) ;-)
I'll explain a bit my options:
We keep the most used one's via strong ref on VFSInitializer,
but let other temps be GCed asap.
- (4) with limit long enough to do common apps deployment triggered
upon this cache
We make the timed limit long enough that most of apps make advantage of
this vfs cache,
once initialization period is over, flush it all.