Except each container has its own libc and any other dependencies. If any linked binary or library has a different inode, it gets loaded separately. I would say it is indeed quite similar, even if the images in question here aren't hundreds of megabytes in size like with Electron.

Still the same issue of a still pretty big overhead that is unnecessary in the vast majority of situations.

At my current workpalce, ~20% of hardware goes to docker. Is it still worth it? For the company it is I assume, since we can let developers with fuck all operations experience deploy stuff without bricking our servers. But we could also be hiring operations people who know how to run applications on servers without fucking them up, but of course in a money game docker wins out for ease and speed.

Importantly, comparing stuff like Electron though, we can scale up the hardware and that's included in the cost of running docker. Desktop users stuck with shit like VSCode, Beekeeper or Mongo Compass can't realistically do that though, PC upgrades aren't something you do in 10 minutes and even then your options are limited.

So for companies and servers, docker makes a lot of sense. Especially on the business side. For a private end user, these virtualization tools remove the potential performance all that fancy hardware nowadays could provide. And in the case of Electron shit, they also make for a worse inconsistent UI and laggy interactions.