Thank you, & silly me. I wrongly wrote “safe”, when in fact i should have instead asked about “stability, reliability”. I do indeed have a working assumption that later kernels will be more secure than older kernels, but [having never before tried an RC] i had some anxiety about whether system stability & reliability might be sacrificed [given after all RC is by definition not yet “stable”]; ie, whether running an RC might turn my pc into a crashaholic. Yes yes, i can read your minds… “sheesh, why doesn’t she just shut up & try it for herself rather than all these inane questions?”. Fair cop.
Yes, well per my own thread on this current problem, any interest i might have in trying the RC relates specifically to the weird “out of the blue” loss of network after Resume problem that only very recently befell my Tower. However, as i made clear in that thread, the problem manifested WITHOUT me having made any kernel change or relevant software change. One day it was fine, next day it was not. Hence, i am still struggling to find any logic in hoping that 4.18RC might fix a problem, that was never a problem on 4.16 & 4.17, until one recent day – bam!