Actually, quite a number of poly frame pistols work this way, including the Springfield XD series. Follow the Golden Rules, and there's nothing unsafe about it. Before taking down any semi-auto pistol, the magazine should have been removed, the slide manually locked back, the chamber and barrel press-and-sight inspected, and the slide returned forward. Only then should you rotate the takedown lever and (still pointing the gun in a safe direction even though you now know with metaphysical certainty that it is unloaded), the trigger engaged and the slide assembly slid off the frame.
And still, I don't care for Glocks because I find them bulky and dislike the absence of a single external safety feature.
Agree.
While some may like the absence of a safety, I think that it is advisable unless one is in the mountains of Afghainstan. Walking down the grocery aisle at the supermarket, I want at least one safety.....call me crazy.