It's cool that emulation for the Sega CD is getting better, but the problem with emulation is the unless it's exactly creating the hardware via software the compatibility will be spotty. Even with exact replication there can still be all sorts of issues.
Think this is a cool project, especially since eventually all SegaCD lasers will die and replacements will be harder to find, but I'll still keep playing on my real hardware.
As for the haters on battery replacement and other issues, they're not that big a deal. I've replaced them on multiple systems and it's like a 5 minute job if you've got the parts on hand. I always put in a holder to anticipate for future failures, and the most expensive part is finding a rechargeable coin cell vs a stock CR2032.
It's also probably one of the least expensive systems to grab games for, the number of good games that break $80 is pretty low compared to other systems.