... rest of us, the idea that you can count on the fact that a business, organisation, or individual can make or receive PSTN calls will no longer be 90%, or even 50%, assured. (I suspect the breakdown point is somewhere close to 71%, at which point the chance that any _two_ entities have phone access reaches 50%.)
And once that point is reached, things will change very, very quickly. The flipside of network growth dynamics, with their positive-feedback cycles, is network _decline_.
[Notice Regarding the Transfer of the mstdn.jp / mastodon.cloud Services] We have received several inquiries showing interest in a transfer following the announcement of the end of the mstdn.jp and mastodon.cloud services. As a result of subsequently evaluating the situation and making preparations, we have decided that the corresponding services will be transferred to Sujitech, LLC. on June 30. Thank you.