Why I dislike NVRAM

Perhaps a few of you remember my trials installing F20 on my Lenovo x120e. NVRAM writing didn't, and with help here I got things working but without NVRAM info and things are working perhaps a bit strange. Anyway, I got tired with so hardware problems and saw another x120e for only $149 (bad battery, but hey I got a battery), so I got it and swapped in the f20 drive I built on the old system. It works, with a few caviats like all of my WiFi settings have to be relearned (I suspect that the info is MAC based); I can deal with that. But imagine what it would have been like if I needed that NVRAM info? I looked (mut not too hard) to see if there is any advise on moving install drives between systems and how to update NVRAM. I suspect that booting from the liveCD and doing what I tried to do before would be the main step, but still it would be nice if moving drives between systems worked (or maybe it does, and since I did not need it, I did not see it). BTW, the new system came with Win7 on its drive. So I put that drive in the old system, and Win7 was not able to do the repair to work. Either it does not have the ablity to deal with changes in NVRAM, or the NVRAM is so problematic now on that system that it could not. So anyway, I will attempt a F21 beta install on it after Passover Holidays.