Apropos to this, my SIL had a text meltdown because “no one” flew 2 hours or drove 4.5 hours and stayed in a hotel overnight to attend her daughter’s college graduation. Apparently this is proof that we don’t love my brother. FWIW they spent $300k on her college, more than most weddings. One sister did attend. Grandparents are 84 and 89 and didn’t even attend the last out of town wedding. A 2 minute walk across the stage seen in a football arena? Who cares? I didn’t subject my parents to my graduation from a fancier college. Same SIL and family didn’t attend my graduation either.
I am definitely the wrong person to ask, as I’ve stopped attending even weddings. I find them boring, too large to have conversations, and basically offensive in the “permission to have sex” tradition. Life commitment is a hope.
In general I’d say that if you want to invite 50 people to commemorate a milestone, go for it. Don’t expect presents to do so. I wouldn’t say college or even high school is the easiest phase of life, but I did get tired of attending every piano recital, 6th grade graduation, sports meet. Especially considering that said niece missed my birthdays for 14 years due to her sports schedule.