So I love my Pen-F. I like the rangefinder form factor and small size and enjoy the good looks. On the other hand, I don't care about the front knob, I seldom use it. After one year of shooting with it I added an E-PL7 that I can just toss carelessly in my bag. I often go out with both cameras fitted with a prime lens. Or on holiday I use the 12-40 f2.8 on my Pen-F and the 40-150 plastic fantastic on the E-PL7. This works for me as they are both very light and I don't need to switch lenses. One thing about this set-up bothers me: the different control schemes owing to the lack of buttons on the E-PL7. (I don't use the exposure compensation button on the Pen-F by the way, I think it's too stiff.)
I'm going to keep the E-PL7 but I was thinking of adding the E-M5 III. Advantages: more dials, an EVF, better AF (I never tried to shoot anything moving with my Pen-F), more MP, slightly better image quality. So on my trips and travels I could use the Pen-F and the E-M5 III side by side. The E-PL7 will stay my "throw in the bag" camera for daily shooting.
Cons: I still use Lightroom 6 because I don't want to pay for a license every month. I import my photos in Lightroom for cataloging and then export to DXO Photolab for the actual post-processing. So I don't know if a new unsupported camera will fit this workflow.
It might be GAS, but the last time I bought photography equipment was some time ago and because of the pandemic I am not going to be strict on myself for wanting a shiny new toy. Black or silver?