I'm a 72 year old, based in Western Australia. Retired from full-time high-school Science teaching. Now doing the design, typesetting, and production for Cape to Cape Publishing, hence the biggish Macintosh. Still do lots of bushwalking to make sure our publications are up-to-date.
Your opinions about Rosetta@home
As an ex Science teacher always interested in research, so glad to put the spare capacity of the Mac to good use while its doing book production. When it's summer here, it gets very hot. I then throttle Boinc to only two of the 8 processors to stop the Mac from generating excess heat. In winter I run on it on all 8 processors to help keep the room warm.
Of all of the many 'sophisticated' programs that I use daily, Boinc is the only one that uses all of processing power of this Mac, if I allow it to. Well done!