To sort of bring it back on topic.....
Our group has played all the editions in one campaign over the last 13 years*. Yes, we started with the D&D LBB (little brown books) went to ADD (for a bit...most of us didn't like it), jumped to 2, dove into 3.0, transferred to 3.5 pretty seamlessly (one player was only peripherally aware of the change ); And therein, when we all took a very serious look at 4.0 was the rub. It's a great ruleset, fast easy, and exciting -and only about half of us do MMOG at all; much easier to play and etc, certainly less of a transition from 2 to 3....and heck, we have always been a bring out the battlemat bunch of players when combat looms (in fact, the changes to the combat system are one of the things we all agreed were useful and adoptable)....but. With the exception of Nar the Big Fi-Ter character player **, there didn't seem any way to port our old characters over, and thus continue the campaign at a personal level .
Yeah, we could copy the stats and futz around with the skills and spell lists, use the same names and histories, but the actual flavor of play and opportunities for roleplaying were entirely different; not neccessarily lacking, just
different . Much of who our characters were, it seems, was due to the environment of the rules (how unlike real life..

). And, that, we discovered, is what we didn't want to bail on.
We'll probably play some 4.0, but as a different campaign with different characters, but we really discovered that starting over and leveling up with a new bunch of characters meant throwing away all that history and backstory. And that was a big investment, particulalry since lifspan estimates suggest that most of us don't have time for too many more 12 year campaigns left in us.....so, were we less roleplayers (a realization which surprised most of us) the conversion would be easier.
How is this back on topic ? Well, MGT has
not made the same change as 4.0 did -and to some extent, I think the 4.0 revision is creating much the same issue as TNE did -making the characters and backstories and "look and feel" that the the players developed over years of play in their own campaigns unportable. One could argue that it too was perceived as being pitched at a new audience, possibly at the expense of the original audience, also exacerbated the problem.
So, bravo MGT - in producing such a "look and feel" compatable edition (with just about all of CT, MT and T4) you really, really missed a bullet, it seems to humble little know it all me.....
* it started as an experiment anticipating 3.0. It turned into a lifestyle. Go figure.
** and he was tired of playing Gonad the Wagnerian in any case. He just felt that it
could port over unchanged.