No, actually, I think it is great. Flash is a resource pig that Adobe chooses to not rewrite for mobile platforms. Android devices puke trying to use Flash with some of the larger, faster tablets having mixed results of flash content actually working as intended.
I don't see how you think that Apple has gotten more closed with the Mac/Mac OS since the PPC days. Owning a Power Mac 7200, you probably remember having to purchase special Apple RAM from manufacturers like EDGE, Kingston, etc out of the MacMall catalog. Adding generic RAM (even with similar specs) often resulted in a non-bootable Mac.
How about hard drives? Apple HDD ROMs. Yeah, good luck with getting that generic HDD from WD, Seagate, Maxtor, Quantum, etc working. (pre-PPC machines also used SCSI drives that were awesome, but pricey and hard to come by) Don't forget about proprietary ADB connectors, Apple serial ports, display ports (including that stupid display adapter needed for the Power Mac 6100/66 and similar models), Apple GeoPort (WTF?!), Mini-SCSI on the PowerBooks, Apple PlainTalk microphone ports (again, WTF?!), NuBus vs PDS slots. As of late, ADC video connector, but we'll give Apple a mulligan.
Macintosh System 9.2.2 and earlier had little PC file support with the exception of PC Exchange to read DOS/Win formatted floppies and other media. Most Mac users bought MacLinkPlus or a similar product to help them open DOS/Windows documents on the Mac. Image formats were another difficult area with Apple pushing PICT and Microsoft pushing BMP.
Apple may still have a bit of a "walled garden", but the gate is open a lot wider than it was in the 68k/PPC days.