I think the years after the last show of the Rebel Heart Tour were already a hiatus. It's obvious that long tours like that previous one, and then 3 years and a half break till she starts a new tour are not doing her favours anymore with her age. Probably the best thing will be resting, and schedule the things better. I can't understand the rush to do 80 dates all together, and then disapearing for 3 years, and then start again to rush everything with the next record.
Things doesn't work like that anymore, she should focus on less cities but big ones, arenas, and bigger breaks between dates.