It can be difficult. I went cold turkey and if people wanted to contact me they either had to SMS me, email me, or install Signal. Most went with the latter over time apart from some older family members that still use SMS. I’m never going to persuade them to change that behaviour and that’s OK. Overall it wasnt too tricky it just took a bit of time.

I actually ran into more problems with a former employer demanding that I install WhatsApp on my personal phone. That got really messy and stressful.