Has anyone done FTTH (fiber to the home)?

Then exercise self-control in this case. If your servers are already located in the data center, what's so wrong with 50Mbit? In 5-10 years, fiber will have arrived there as well. I consider this a failure on the part of the city planners. You just have to get Telekom on board in time. Especially in upscale new development areas, Telekom fiber is everywhere. Even when regional providers or cable companies have installed something. The investment is simply much lower when a new development area is being connected. Otherwise, store your local working environment entirely in the cloud, data center, or whatever. Then bandwidth no longer matters, only latency.

I'm so glad that there is 100/200 MBit Vdsl here.

Needing fast internet is one thing, but laying down €39,000 for it?

The technology is practically outdated before they even tossed the distribution cabinet. But you probably have to ask yourself who is ripping you off here.

How high are the costs for FTTH?
The price for the house connection is around six hundred euros. Usually, you don't have to pay more here than for conventional technology. And the monthly internet tariffs hardly differ from the classic DSL connections.

Probably in the business sector, right?

No, you can order an individual FTTH connection as a private customer product at Telekom. So, where it is actually not expanded. For that, you are heavily involved in the costs.

But if there is VDSL 50, I wonder what the 39,000€ is supposed to cost. The fiber is already laid up to the outdoor DSLAM or the exchange is very close. This only reinforces the impression you get online about the "More bandwidth for me" product: pure marketing product.

Do you really need that much bandwidth at home? I mean, when I work with a lot of data, I do that on a remote machine at the company and only have to access it via remote maintenance.

The costs mainly consist of costs for civil engineering work from the house to the distributor, and that is quite a distance.

Well.. even when surfing (I do that a lot.. I practically look at websites all day long ) it is a difference. When I went from 30 mbit to 130 a few years ago... that was a powerful "ah ha" effect

Do you ever actually say no or can anyone sell you anything?

But yes, you would probably enjoy glass, because the real difference will be the reduced latency and not primarily the higher bandwidth. That is probably also the difference you noticed between 30 MBit (VDSL?) and 130 MBit (Cable).
But 39k? Stay grounded.