to upgrade or not to upgrade

hey guys, here thing. have imac 2011 snow leopard, upgrading lion before mountain lion's release. hav simple questions:
1) hav major programs improtant me , work, cracked, , i've heard people, programs being cracked , unpdatble, had issues after doing upgrade. programs in mac not date, , therefore may not work on lion right ? or no ? plan via mac app store, legally. if isn't made lion, impossible use program ?or run, bugs ?

2) guys think better upgrade now, or wait until mountain lion's released, don't know…

3) hav had issues related apps don't work anymore after upgrade ? ones ? how ya solve ?

thoughts , advices appreciated. in advance , sorry poor english.

 

before buy lion external thumb drive (8g or larger) make lion install drive described in article how make bootable lion install disc or drive ( imho usb thumb drive faster dvd installing). way can fresh install @ leisure. plus multiple mac lion installs.

 

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