63yo and a new 29" FS about six months ago--not because there was anything wrong with the old hardtail. I stick to easy/moderate MTB trails...there are many around here. I only do game trails on foot and then carefully. Lots of folks my age (and yours) ride MTB in these parts. I generally ride with groups (near the back), so some one is around to notice if I don't return to the parking lot in a timely manner. We donned our lights a couple of weeks ago as our group rides are now after dark.