Although this is a coincidence, I actually bought my GX100 as a replacement for another Ricoh, the Ricoh XR-X 35mm SLR which I've had for many years. However only the body of my SLR system was a Ricoh, as it in turn was bought it to replace another camera, my Pentax ME Super, after I got fed up of the Pentax's crappy centre-weighted metering. The Ricoh XRX was the only K-mount body on the market which offered semi-spot metering or an AE-Lock. So all my lenses are actually Pentax ones, and very nice they are too (very sharp and small). My recent choice of the GX100 to replace my SLR was determined by the fact that my most used lenses were the 35/f2.8 and 20/f4, with only occasional use of telephotos (such as an 85/f1.8), so the GX100's 19mm + 24-72mm should cover about 90% of my shots.
The XR-X is a nice camera, the only real drawbacks were that it was rather bulky compared to my little Pentax (though probably no worse than the modern DSLRs — whose excessive size and weight is why I didn't buy one!), also some of the buttons like AE-Lock are not only recessed but also need a firm press, presumably to avoid accidental activation but this made them harder to use and impossible when wearing thick gloves such as in winter mountaineering situations.
Like all Ricohs, the XR-X was pretty feature-packed for its day, but I have to say I didn't actually make use of the fancy stuff like intervalometer or multiple-exposure facility. It also had an early attempt at intelligent metering called ABLC (auto back light control) which was supposed to compare the spot and averaging readings and automatically choose an appropriate exposure, however in practice it seemed to just add about a stop to the exposure — regardless of situation!
In the end what drove me to digital was not so much the need for any new features but the hassle of carrying 2kg of gear around with me all the time when I really prefer to travel light. I now have two 250g digital cameras, one for each pocket! The GX100 for most stuff, and a Nikon S10 just for telephoto work, as it has a 38-380/f3.5 stabilised lens which I can handhold at 380mm even in poor light (helped by the fact it can be used for waist-level shooting thanks to the swivel LCD), a feat I could never manage with my SLR's heavy zoom. Apart from its long reach, at 380mm the Nikon also gives me the wonderfully shallow focus that I loved about my Pentax 85mm/f1.8 lens (though it's nowhere near as sharp — Nikon have equipped the S10 with only average quality optics I'm afraid).