I don't think it's recruiters - hiring managers want someone who can "hit the ground running" so look for an exact match between the technology involved in their current project and the experience of an applicant.
The same managers then wonder why their teams are reluctant to work with technology that isn't "hot"....
Can't really blame them when it's part of our culture to start looking for a new job once we've been there a year, why would they want to invest significant amounts of resources into you?
Then again, maybe you can blame them, as at least part of the reason for this part of our culture is that it's the best way to get high enough promotions to get up to our deserved salary (as defined subjectively by the engineer).
The same managers then wonder why their teams are reluctant to work with technology that isn't "hot"....