YMMV and this probably heavily depends on the provider and location, but in my experience, at multiple locations, cable is rock solid, generally delivering close to advertised speed.
Sure, they might be a short (<1h) outage once or twice per year, but even fiber infrastructure is not immune to this.
Well... We had a ton of issues with DOCSIS until a few years ago, when they built fiber to the nearby pole, and the cable is just a few meters inside the house to the street. Before it used to break all the time.
Yeah, they will eventually bring fiber to the apartment. This is Germany anyhow, it will happen in the next 10-30 years.
Sure, they might be a short (<1h) outage once or twice per year, but even fiber infrastructure is not immune to this.