The shifting appearance of meditation

We don’t see as much written on meditation as we do on trail running, iron man races or even hot air ballooning. The practice behind meditation is much more elusive, diversified, secretive and so subjective that few come forward to translate it into words.

It’s probably why I feel compelled to intervene as I’m closing in on 5 years of daily practice. In a few words, I just find meditation to be just like a moving target. One reaches a certain level or target, and everything suddenly changes and forces the user to switch gears. 

What used to work reliably no longer does and, if anything, this forces the practitioner into being more focused on what is going on. Expecting the unexpected seems to be the rule when one meditates. 

Is there any reader-practitioner around who can confirm this?