Since they invested their time in you, I would suggest that you give back in kind. Call them, send them a note, email/text, etc. It is easier than ever to keep in touch with people now-a-days. Meet them in person if they are open to that and you are able to.
If some of these mentors are retired, I'm sure they would love to hear from a former protege/student/mentee. Watching my dad after his retirement, he always enjoys these interactions with his former colleagues -- talk about their profession or department. Made his day/week in most cases. Retirement can be professionally lonely sometimes.
I've worked directly with several HNW individuals, and the biggest "snub" (real or not) I ever witnessed was a multi-millionaire who sabotaged a mentee's already-disastrous wedding... because he wasn't thanked in the wedding handout.
Dollars meant nothing to him, but control — and meant nothing to this Groom.
>If some of these mentors are retired
Retired people typically rock, so-long as they didn't spend their entire careers being bullies. For several years I lived in a retirement community (as "the help") and the endless dinners/conversations rarely "got old." I mostly enjoyed working with/for elderly retirees, except that most seem to have almost no concept of how much dollars have deflated since their pre-70s/80s/90s gold-backed hayday.
>[things you could do]
Help raise "the next generation" by living well and mentoring your own deserving minds — perhaps have an informal lunch with both your advisor and advisee?
This the same pattern as retail stores making it hard or easy to return a purchased item. If the return process is simple and straight-forward for the customer, they will not hesitate making future purchase decisions even if there is some uncertainty. I know there is some pain involved for the retailer, but it should part of the cost of doing business.
Interesting hypothesis. If it is true, what does it say about social networks like FB if in-person networks provide better trust building than online ones.
+1 for the TP-Link EAP225 and its brethren (they have a cloud management portal, but with just a handful of units they can be managed individually or via self-hosted management server).
I use mine with a Mikrotik RB4011. A very stable and reliable combination.
If some of these mentors are retired, I'm sure they would love to hear from a former protege/student/mentee. Watching my dad after his retirement, he always enjoys these interactions with his former colleagues -- talk about their profession or department. Made his day/week in most cases. Retirement can be professionally lonely sometimes.