I made it to the summit yesterday, 6/19 around 12:30 PM. I took the switchbacks up and down.

From my experience and talking to a bunch of other people on the trail, I think there are two things that will affect whether you want to use microspikes or crampons: your timing with respect to the temperature and your comfort level/risk tolerance.

Timing/temperature: Since it's still freezing up there at night, but there's a lot of snowmelt and water on the switchbacks during the day, if you start up from trail camp too early, there will be sections of the switchbacks that are a bit icy. I met a few people who had headed up early from trail camp and turned around because of the ice, even with microspikes. I started up from trail camp around 8/8:30 and the ice was starting to break up at that point. Obviously, if you summit too late, you would also have to worry about refreeze at some point. All of the ice was melted and the snow was soft when I was on my way down the switchbacks around 3.

Comfort level/risk tolerance: If the snow is soft and the ice is melted, I think there are still three sections that might seem scary depending on your personal risk tolerance and comfort level. First, as mentioned above, there is a section of about 10 feet where you have to duck outside the cables because of the snow. There's still a lot of snow there. Second, the top of the switchbacks over to trail crest are still covered in snow, which means that you have to cross the chute on snow. Third, there's a stretch of three patches of snow between rocks just before the summit; these are mostly flat, but there is a little bit of elevation change in the middle one. Personally, I put on microspikes only for the stretch across the chute because I thought it would be a pretty dangerous place to fall, but I am also very comfortable on snow and rock in general. I also saw people who wore spikes or crampons the entire way from the cables to the summit (they walked in a lot of dirt with them, though).

Thanks to all for your reports leading up to yesterday; they were super helpful!