I think Richard would object to anyone else giving me footrubs, lol

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In all seriousness, we'll see how things shake out on the new forum before I say things won't change at all. But please keep in mind that unless you plan to reply to the PM, the new software will allow you to download the PMs as a file to save on your hard drive, so that should help some. We came up with the number based on experience I have with forums who have this software (one of the forums has only a 70 total limit because of the number of users they have, others have more because they have less users), and the analysis of the current database.
But as I said, there will probably be a settling in period into the new forum, so some things including limits may get tweaked.