Yours isn't a low end bike and this might be the price point for you if you aren't enthusiastic about it at all. I don't know a lot about town bikes, though. I prefer road bikes (even for commuting and getting around town with panniers).

Higher end bikes don't have any "features" that yours doesn't have. But you could also spend half as much as you did and still get the same features. Higher price points get you lightness and stiffness. This translates into speed or less effort, depending on your preference. You also get higher quality components that will last a long time or you can swap out and sell if you wish. Low end bikes tend to be disposed of as a unit as they are not worth taking apart.

But what’s that gonna provide for me? There’s diminishing returns beyond this point, the efficiency gains are in the single digit percentages or often only placebo effects, and I’ve never even seen a bicycle that stopped being used out of old age. A new coat of paint every decade or two, replacing the tires and brake pads every two years, and maybe the chain every decade, and it’ll run forever.

I feel like it’s just like people buying expensive sports cars, purely because they can, not because they actually need any of it.

Lighter bikes are more comfortable to ride - they feel nimble. Modern frames absorb bumps while still being stiff to allow maximum leg power to actually go through the drivetrain instead of frame flex. Disc brakes make an enormous difference if you have long downhill sections or regularly ride in the wet. Sure there are diminishing returns, but better components really are better, and not just 20g lighter.

High end derailers shift easier, chains have lower friction (especially in high/low gears), spokes and rims are more aerodynamic and stiffer, ratchets have smaller engagement angles, brakes require less force and don't overheat, tyres have lower rolling resistance and better grip, seat posts have compliance to remove chatter etc., And this is before you get into eg. MTB specific features like chain clutches and suspension tuning, or for triathlon aero bars, for city bikes pannier clips and built in lights, etc

> But what’s that gonna provide for me?

Nothing. Bike manufacturers and smaller builders are not trying to sell these bikes to you or to people like you. How hard is it to enjoy your "normal bike" and move on?

Some people ride their bicycles for thousands to tens of thousands of miles per year. They're going to buy what they want so that when they do ride, they enjoy it.

IMO, most of the real improvements are seen going from $300-ish to $1200-ish. Going higher doesn't give you more features so much as more quality and durability. In my experience, if you ride a lot of miles consistently on a cheap bike, parts will wear out or break pretty fast. Especially if the terrain is at least mildly rough, as found on most commutes and country roads.

Cheap wheels go out of true easily and before long are often too bent to be able to true by spoke adjustments. Cheap tires wear out fast and puncture easily. Cheap brakes wear out and go out of adjustment fast. Ditto cheap shift gear. I've broken pedals too, and I don't pedal all that aggressively. Really cheap stuff tends to be excessively heavy too, which can be a drag on uphills and when you need to carry it.

Yours looks like a perfectly fine commuter bike to me. I'm not familiar with the wheel or shift gear classes, but if it gets you where you need to go without wearing stuff out too fast, by all means no need to spend more.

> What does your 800€ bicycle have that mine doesn’t have?

For that much money, you could afford... a Rohloff hub? No frame though