I would assume that this is not the typical market for RME.
A very well designed DAC/Preamp/Phones Amp (amd Format Converter with SRC) in this quality and the well-known unique selling points can be used everywhere, no matter if in the studio or in the HiFi area. In many cases this has reduced the number of devices in the signal chain and improved the sound.
In the studio, you're more likely to be dealing with active monitors. With the exception of the large studios, which also use passive speakers (B&W, etc.) as Reference Speakers for customers who demand it. But there, as well as in the HiFi area, other brands may already be set.
Also demands and tastes are very different: tube, Class-A, mono blocks, integrated amplifiers (or not), ..
I wouldn't be so sure if there is a market for RME Power Amps and whether it would pay off for RME to bring a poweramp onto the market and to compete with a lot of other companies.
In the area of DACs / AD/DA converter its different. There is currently no other manufacturer able to deliver this quality to this price with these features.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub13