Let me make this clear again... I'm not an Apple hater. So please, spare me the Mac vs Windows garbage.
"It sounds like you are attempting some sort of attack against the Mac OS without backing it up with specific instances. So please enlighten us so that we may help you out with issues that you are having. Thanks."
Would be glad to...
Airport:
-Random disconnecting and then reconnecting to a neighbor's router.
-Temporary connection interruptions. ex: streaming movies over LAN or Internet will pause for 1 minute +. I would be forced to restart Airport, although I would also have to restart my browser as well.
-This being the worst... Airport would bypass default router and connect to neighbor's router upon boot-up. Couldn't resolve it and performed OS re-install.
Note: I tried 3 different routers with no success in resolving issues (2 D-Link and 1 Netgear); although, I never tried the Airport router.
iChat:
-Manipulation of port settings, either in OS firewall or router firewall. Sorry bud, not as simple as entering name and password and clicking OK.
-Inconsistent video chat success with another AIM Windows user. Would connect on first try, but not on 2nd or 3rd... Required us to reboot machines. Again, tried different router configurations as well as different locations all together. Other user did not experience same problems with anyone else and therefore I concluded the problem was on my end.
10.4 Program incompatibility:
-As I stated, I work in a Mac\Windows software development environment. I won't give specific names. All I can say is, we publish titles that are OS X native and are not compatible with 10.5 (x86 or PowerPC).
Updates cause system instability:
-Not every issue stated above occurred upon clean install; the Airport issues moreover. That being said, Airport went south from either another piece of software, or virus/spyware (that opens up a whole other can of worms), or system updates.
The only 3rd party software installed on my machine was Office, File Maker, Firefox, Sunbird, Adobe creative suite, Cyberduck ftp and Parallels with BootCamp XP Pro.
I was under the impression that OS X virus/spyware vulnerability was pretty minimal. And, being a experienced computer user, I know what to and not what to download or install.
I speculate, with the amount of Airport updates released through system updates, system updates were the cause of my Airport issues. Please note: I said "amount of Airport updates".
-Over a period of 5 months, my system degraded in terms of performance. Mainly, longer boot times and program start-up times.
-Over a period of 5 months, my system became more unstable. I mainly noticed this with Safari and Firefox becoming non-responsive. This could be a result of the Airport issues.
Please make note that I'm not stating that Vista is any better; however, based on my experience, I am stating that 10.5 is not any better than Vista.