@Quickswitch79 Due to the magic of the Fediverse you don't even need to be on Lemmy!
Kbin is another similar system that interacts with Lemmy, and this reply has come from Mastodon!
Although in general I wouldn't recommend using Mastodon to interact with Lemmy communities, it works but it's not what either system is optimised for so it's a bit clunky.
But it's still pretty amazing to me: it's like using Twitter or Instagram to read and reply to Reddit!
As of now, it does matter. I'm on kbin.social, but atm I can't see most content and comments from lemmy instances. Something is not federating correctly.
It does not, right now I can see posts from other instances (like this one), without leaving mine (discuss.tchncs.de). You might actually get a better experience on smaler instances, as the big three (lemmy.world, lemmy.ml, bbeehaw.org) can get quite slow at times.
If you're using the web-ui, you can change the scope of your searches to include external results as well. You can subscribe to any community without leaving your home instance.
Same reason there are multiple phone companies. Verizon, AT&T, T-Mobile, Google Fi, Cricket Wireless, Mint Mobile, etc.
They all allow you to communicate with your friends no matter what provider they use. But the companies are all slightly different. You might choose one due to better coverage, or customer support, or corporate ethics, or simply cause a friend recommended it.
Phones are redundant. So if Verizon fails, you can always sign up for another provider and still talk to your friends. Or if you have a bad experience, you’re not stuck using something you hate.
Plus, if one company ruled all of phones, it would be a bad thing. Monopolies aren’t good.
Lemmy isn’t the only thing out there with ‘multiple websites’ online. Email - there is more than just gmail, outlook, yahoo, proton, etc.
It’s not confusing to you that there are multiple email companies, that all work together, right? You don’t need a gmail account to send a message to a gmail user.
So don’t think it Lemmy like a website owned by one company. It’s not. Just like nobody owns “email”. Think of it like a protocol.
But I get it. Lemmy is an emerging technology. People are expecting it to be new Reddit. And it is on the front end. But it’s closer to new email.