Your perogative of course, but not updating ever will eventually cause you more issues especially with WP updating to 4.3 and will soon be going to 4.4. All plugins need to skip to that tune. The fixes for the various releases are listed here:Release Notes
Also Lance is working on a patch to a bug that he was unaware of. Some of the plugin styles were breaking (for a while now, since mid 4.2.?? releases) where it would show [slp_location weblink raw wrap=“fullspan”] on some style settings.
Any style that had a setting with double modifiers.
A modifier can be a single word… like raw
Or a key/value pair like wrap=“fullspan”
That is fixed in 4.3.03 which is coming out soon.
If you have back up capabilities, which is strongly suggested if you are doing a lot of custom design. Lance has an article about it here:VVV for WordPress
Keep abreast with whats going on by following the news blogs. The last updates or fixes is here:
More PlugIn Updates NEWS Aug 23