I gave a very reasonable explanation to Kurt as to why I don't have time to upgrade so often, but forum admins said it contained "inappropriate comments," so they deleted it. You might be able to empathize with my difficulty had you been able to read it.
Unfortunately, it must have been removed before I had an opportunity to read it.
Believe me, I do understand that many users can't, or wisely don't jump on a new major OS release for darn good reason. I don't either. My Mac is a production machine for my in home business. Immediately putting an untested OS onto such a Mac is about as stupid a thing a user can do. Look at the comments on Extensis' site regarding Suitcase Fusion in regards to El Capitan. Absolutely amazing how many "professionals" jumped on El Capitan on day one, apparently without a restorable backup, then blame Extensis for their poor judgement. It isn't until you get down to Don't B. Arookie's comment that someone finally says the obvious.
Two weeks before El Capitan's release, Quark sent out emails to all of their users telling them NOT to upgrade to El Capitan right away. Because Apple could possibly make important programming changes to the OS even just a day before its release, they were waiting until the official release of El Capitan before they created any updates to XPress and their other products so they didn't have to possibly do the work twice.
I reacted very poorly to Kurt saying I "procrastinate" and had "a year" to move to Yosemite, although I probably deserved HIS reaction to my initial rant.)
I apologize if it sounded like a scolding. I was trying to be as emotionally flat as I could be with only text to use for conveyance. Sometimes no matter how you word things, it can still be taken more than one way by the reader.
It certainly is a bit of a nuisance for users to have to get an OS while it's available, but it also makes sense from Apple's point of view. Mainly, what did users pay for it? Nothing. So what are they taking away from users? The answer is still nothing. It's not like you paid for an HD TV (or pick anything with an actual cost), and then one day a representative of the company who made the product shows up at your door and just takes it. "Sorry, it's obsolete. Buy a new one." As far as Apple is concerned, each OS release is an improvement over the previous ones. And more importantly, Mountain Lion, Mavericks, Yosemite and El Capitan all have the same hardware requirements. So why keep the other two free OS versions around? Use the latest and most improved version.
That thinking of "Use the latest and most improved version." of course doesn't help users who have software that won't run under the latest OS. Or in some cases, because the vendor went out of business or simply has no desire to supply updates to software you can't do without, may never run under anything but the last OS you could use it on.
I would download El Capitan now. When the download is complete, it will launch the installation process. Press Command+Q to quit. Then copy the installer to an external drive for future use, or even just delete it. Now that it's in your App Store account, you will always be able to retrieve it. Even if you wait until the next major release of OS X to install it.