Quote - "IF... there are 7 Reasons for getting P7... will there be 8 Reasons for P8... and so on..? Sheesh.... when we get to P52 it will take a whole year after it is announced until it ships."

By then they will have a new marketing system. You pay up front and get each feature as a separate patch as it is announced, that way they can fix the big blunders during the release and sell them as new features (so only about 30 real new features are required, together with 22 enhancements that were promised earlier but didn't work out as promised).

Shortly after fully releasing everything in P52 they will abandon this numbering scheme and release a new version every week, the new releases are probably free of charge but compatibility will be a problem so you'll have to pay for conversion (every week). You work on something and it doesn't work, file a bug report, get the next version (pay for conversion), the problem is fixed but of course something else is broken now and start all over again.