Nyfure

Index of repositories is held locally, so if you use the same repository with multiple machines, they have to rebuild their index every time they switch.
I also have family PCs i wanted to backup too, but borg doesnt support windows, so only hacky WSL would have worked.
But the worst might be the speed of borg.. idk what it is, but it was incredibly slow when backing up.

Was using borg, was a bit complicated and limited, now i use kopia.
Its supposed to support multiple machines into a single repository, so you can deduplicated e.g. synced data too, but i havent tested that yet.

I mean the tools mentioned also support these features, how does duplicacy and its prorpietary software make them better?

Convenience will kill the cat

Good points.
Although I have flown a few times on low-cost airlines in Europe, most of them also don't care if you don't test your luck with your carry-on.
They often don't have enough time for thorough checks anyway. I got checked once, and it was fine.
I often prefer to place the carry-on in the hull when offered (personal preference and a willingness to take risks).

Additionally, when flying to or from EU (and associated) destinations, you have EU Flight Rights, such as fixed compensation after certain delays.
This is in addition to the right to get any costs replaced, like hotel, food, and taxi.
There are companies that make it very easy to enforce your rights when the airline denies them. Of course, they want a cut, but either you pay a lawyer upfront or try your luck with them with no risks.

It not only has to be not 'open' in the explorer, but properly unmounted. Tools like mkfs dont do that for you, its just not their job. (and might be unwanted or stop your from making mistakes like accidentally overwriting the wrong drive)

try umount /dev/USBDRIVE

If that still complaints about Device or ressource busy, then something is still using it.
Either try to close things that might be the culprit, reboot and try again or, if installed and you are compfortable, you can check which processes using lsof -D (you can get that location using mount | grep )

Want the walled garden, live in the walled garden.

I won’t be able to browse suggested videos

Whats funny, you do get recommendations on videos, so would be quite easy to grab the last 30 or so videos of your subscriptions and display some of those on the home-page.
But at that point.. might aswell switch to Freetube/Piped

In found this often breaks sites, so the combination is still better.

Just FYI Germany likes to make things more difficult, so with federation every sub-area is separated in many aspects and has own agencies for different things..

BfDI is only responsible for health and internet-provider institutions (and a few more).
Otherwise you can send it to the one where the company is located at, or always where you are located at. (they will forward it, but that can take a few months, so better to submit where it has to go).

EU Cookie Directive applies to all website owners within the EU aswell as Websites which target EU users.

It gives clear rules for different categories of cookies like how you need to display them and for which you actually need consent to be allowed to use them.
It also sets rules for how easy certain actions have to be and granularity.
(very simplified)

The real MVPs are websites not needing a cookie banner because they only use required cookies for which you dont need a banner.