You can buy various Samotech switch holders that neatly mount the dimmer switches over normal light switches. Personally I'd say they're the best looking option but they're not beautiful. You can pick up the Hue dimmer switch pretty cheap, particularly if you keep an eye out secondhand too.
Generally in rooms I have lamps controlled by hue and the main light, which is rarely used, just normal. In the hall I had motion sensors so the switches were rarely needed and the samotech covers.
There are other options but they either require a fairly high degree of customising to work offline or they may not work when your internet is down. IKEA stuff may be slightly cheaper and will probably add directly to hue (but maybe with a bit of hassle).
The Hue system itself is very robust. Works fine offline when set up (even not connected to a network at all), including all the routines. I can't actually think of a time mine has stopped working and I've been using it for years.