I had a GSA and wasn’t impressed with the GSAP or the keyless. The GSAP was quite clunky and often didn’t work. Keyless sorted a problem that didn’t exist, but generated problems when the fuel cap regularly wouldn’t open. But it was the ESA I disliked the most. Coming from sports bikes to BMW firstly GS’s then GSA, I was used to setting up the suspension to suit my tastes. The ESA doesn’t give you that option just a choice of presets the factory decide, take it or leave it.
Like Neil W, I went basic coincidentally from the same dealer, with some extras like cruise, Nav, and heated grips. The money I saved allowed me to buy TTX Ohlins. The ride quality was superb with compression & rebound damping adjustment at both ends. Ran that for 2 years before another back operation left me unable to cope with the bikes weight.
I sold mine back to my dealer after refitting the original shocks. They had no issues with buying it and depreciation was only £2.5K. They sold the bike during the close season. So there is certainly a demand for used bikes without all the electronic toys, that numerous posts on this forum have consistently shown not to have a reputation for reliability!!