I gave it a serious go, and I use Kagi search (Orion is made by Kagi).
I'll be honest - I didn't like it. It felt more like Safari than Arc, but fell short of both. I had a particular problem with 1Password, but also the UI just felt clunky.
I haven't tried it for several months though, it might be better now.
There's also the paid SigmaOS browser, which is is the same vein, and I didn't like that either - it makes different decisions than Arc, IIRC the vertical tab is persistent, kinda like slide over multitasking on iPadOS.
I have an ultrawide display and sometimes I'd like to just add a bunch of vertical tabs (e.g. if I'm browsing house listings and want them side-by-side). It'd be cool if I could get a vertically scrolling view of individual tabs, but the UX on that would be difficult to get right.
Oh, another thing Arc is good at is trackpad support - I can just two-finger scrolling between spaces and it's a really nice experience. I will probably move away from Arc eventually, since it's VC funded and pretty much doomed, but I guess if they have a paid model like Kagi I might be tempted.
I also hate fragmentation between devices. Pretty much all my devices are Apple - MBP, multiple iPads, iPhone, etc. The value proposition of native tab syncing is very high, and whilst Arc has a companion app I don't like that experience.
> whilst Arc has a companion app I don't like that experience.
They also just announced that they submitted a mobile version of their browser (at least that's how I read it) to the iOS App Store. It's not to be published until early next year, but I'm also very much looking forward to a better mobile app, not just the companion, although the share extension is downright fantastic.
