Thanks a lot, ewwmayo. I am still learning jade. I have a bunch of cuttings in different media from 511 mix to cactus mix to see which they like most. the ones in 511 seem to flourish the most, and I'm guessing that's because they actually do get frequent watering.... fun to experiment !

My part of New England has had a lot of irregular rain in August, and IME that contributes. When one gets 4” of rain in 24 hours after only what the drip irrigation provided for 3 weeks, the plant tends to soak up a lot and the skin doesn’t grow fast enough to accommodate the extra moisture. As others have said, different varieties often have different levels of susceptibility, but I typically choose my tomatoes according to flavor. You can either shelter them under an overhang where they won’t get extra moisture during rain, or pick the ripe ones before rain, or just eat them ASAP if they crack.

I would say it is not too much sun as your other plants are doing excellent. As for the temperature monitor, you cannot use it if it is in a sunny location. Our deck monitor often shows 110 - 115 but that is not the true temperature so we need to go by what the standard method is when measuring temps. Going from a sunny location to a shady location can be a 20 degree drop on a sunny summer day (depends on where the temps are read). With a weather app on your phone and your location, you can get a good idea on what the true temps are. I can use the temp monitor on our deck before the sun starts baking it and during cloudy days and be within a degree or two of what the actual temps are. Anyway you can acclimate your plant to those kinds of temps. Here is one of Begonia Dragon Wings and a caladium we had on our deck years ago. It did require a daily watering though. I wished I could find DW again as it seems to have waned in popularity - it is excellent in full sun as long as you keep the ground or pot adequately moist. Then I had some succulents on a baker's rack with this big begonia on the bottom shelf that loved the heat and what light it did get sideways. I bought this begonias as crassicaulis but it just didn't look right. So I nicknamed it to Sprawler. I think I finally found the true name, 'Bayberry Lane'.

It is common for broadleaf evergreen trees to discard their oldest leaves on an annual basis. Not all leaves, just the oldest group. In Southern Magnolia this occurs each year at the time of the new Spring flush. The tree is never bare, it just replaces the most senescent set of foliage. Healthy evergreen broadleaf trees don't retain leaves in perpetuity.