I'm a holdout when it comes to updating my software. Months after others have adopted changes I keep on plugging away like nothing happened. Recently, I decided that I would take the plunge and upgrade my MacBook Pro to Mavericks. Since I was still running Snow Leopard (don't ask) and it was free I figured why not.
Downloaded and installed Mavericks overnight and when I got home from work I was ready to play. I was surprised to see how much slower my computer was but that was my fault since Mavericks runs better with more memory and I need to add a few gigs. Fine. A few days later I noticed the first of my major issues. My iPhone wasn't recognized when I plugged it into the USB. Nothing I did worked but thankfully the 10.9.1 update fixed it.
It was a few more days before I discovered what currently has me pissed off. Lack of ExpressCard support. I did some digging across support forums and I saw tons of my fellow Mac users in an uproar and knew I wasn't the only one. There were discussions about what went wrong, possible fixes, contacting third party device providers. My hopes were raised when I saw excitement that the 10.9.2 update fixed the problem. Except, that it only fixed it for mid-2010 17" MBPs. I have a late-2008 15" system and I've only come across two other users with the problem. I've submitted feedback but I don't think there are a lot of people with my machine let alone using an ExpressCard memory card adapter.
I really wish that I could go back to Snow Leopard but that would require a full hard drive wipe. That's a risk that I'm not willing to take. At this rate, this will be my MBP's last OS update and I'll have to look into a new system if I want the latest and greatest.