Another big difference is the file format. Anything saved in PT10 will open fine in everything NEWER than 10. To go backwards, you would need to re-save in 7>9 format(.pts instead of .ptx). If you have TDM hardware(HD cards), then I can see running PT10. If hardware is not forcing you, I would look into newer(up to date) PT. Especially as many features that used to be HD-only, have been ported to the regular "vanilla" Pro Tools(like VCA's and Input monitoring per track)
While many plugins are still available as RTAS or AAX32, assume nothing and check first
