The CDSE actually fits a lot better than many other cards. The M3DS Real for example fits so tight it cannot even eject without external help, yet despite countless M3DS users, I have yet to hear of a single case of that occurring.
I can confirm that the recent line of CycloDS's are VERY tight, and do not fit DS Lites properly.
I currently own three, all were purchased from Realhotstuff, two shipped in september 09, both fit fantastically, although I do not use those ones anymore. I recently bought another one, shipped march 30th, and it is tight.. it causes the DSL to "click" when I push it in. it also feels like it is not getting that tiny lift back up when you fully push it down. also to get it out I have to forcibly pull it out(and again it causes the DSL to click) I put it my DSPhat, and DSi, and it fits just fine in both of those
I can confirm this as well, I just got my CycloDS in the mail today and it's a tight fit, even my MicroSD card has trouble going in and out. I gave my old one away to a little cousin who has just bought her DS Lite so I figured I could just order a new on and use that, but it's quite annoying knowing that I had a better CycloDS then I do now.
EDIT: Taking a close look I just realised that the side of my CycloDS is scrapped because its so darn tight, argh!
I mean, if no-one can buy a PS5, and thus is stuck with PS4 (Pros), then companies would still see some profit from developing PS4 games with PS5 upgrades; meanwhile, if they developed a PS5 game, then everyone who can't get that console won't buy that game, especially at launch.