Are sysadmins, network/data engineers, or other back-end techs subject to the same age discrimination as programmers? As an aging jack-of-all-trades, I've been

Are sysadmins, network/data engineers, or other back-end techs subject to the same age discrimination as programmers? As an aging jack-of-all-trades, I've been wondering if I should refocus more on back-end skills (and skills lower down the software stack) and start transitioning away from app development - especially web development. I'm also wondering if Woody's observations of ageism mostly apply to 1) Silicon valley, 2) startup companies, and 3) web development.