Welcome to THR, Mr.454!
Well, I don't own a Python or a PC gun, but I have fondled them and do own both vintage blued and newer revolvers, so I thought I'd chime in.
Would you have a Greek tragedy on your hands after buying a PC gun, but later shooting a Python? I suspect it'll likely depend on you and why you bought the PC in the first place.
As you've already noticed, there's a bit of "they don't make 'em like they used to" sentiment around. Nonetheless, while newer guns don't have the fit and finish of yesteryear, they generally shoot as well and are just as accurate because of modern CNC manufacturing. That said, the Python seems to have set a high bar for all revolvers, even vintage S&Ws.
Speaking of CNC, if the CNC machinery gets out of whack at the factory, they can send some lemons out, as they don't seem to have the know-how to detect and/or fit these correctly before they go out. Fortunately, S&W has great customer service and will make it right if you get one of these.
Bottom line, IMO:
If you wanted something of high quality that you're going to shoot regularly and is easily fixable if it breaks, you'll likely be comfy with your decision.
If you wanted something of high quality that you're going to shoot regularly, is easily fixable if it breaks, and can be tuned by a good 'smith to be Python-accurate and have a match-quality action, you'll likely be comfy with your decision.
If you wanted something that's got great out-of-the-box fit/finish, accuracy, and good resale value, the Python is likely the better choice.