But the issue of concurrency is more theoretical than reality... in 12 years of using MS Access, I have not had a table crash due to innate Jet 4 table access issues. I'm sure that most AC users would agree, or else they would have posted such, and I have yet to see someone complain of "bumper car" crashes.
I do like that MS did take the MSDE counter off- that was a good move on their part.