[lpsz]

Curious what specifically.

For me the underlying graphics changes and other tweaks in El Cap made my 5 year old MacBook Air snappy again, I use Xcode the entire day and things seem better than before.

There is some initial flux around new release time (broken Homebrew or something else for a week) but they tend to settle down quickly.

[mfukar]

For me what OS X provides is just great. Sane defaults, good UI, they're fine. It's what it doesn't provide that gets me, and Homebrew is a good effort and all, but too much hassle.

[mrweasel]

Interesting, it made my 2011 iMac feel sluggish, not all the time, but in weird bursts. I have code that consumes a fair bit of memory, it's pretty much non-functional on the Mac and you can't do other stuff while it runs, runs in a few minutes on Linux and just a little slower on Mavericks.

More specific example the "Open with" when you right click on something is extremely slow.

It's not really helpful, but over all El Capitan just feel not quite done to me.