the presenter view often doesn't work (e.g. presenter advances the slide, but nothing happens for those on the call, or inconsistent things happen for those in a faraway geo)
I've been using this feature for six years, with people who were 8 time zones away from me, running Windows, macOS, Linux, or using one of the mobile clients. The only times I've seen the first problem is when people move to the next slide by themselves and then don't press the big red 'sync to presenter' button. I've never had the second.