My experience has been, with sufficient searching (and yes, there's a time cost to that), yes, I can.
The upsides: I can see, feel, and fit the garment before buying it. When committing to tailored items, particularly online, no such luck. Clothing's pretty personal, I've never much been a fan of the online or mail-order experience. Their only advantage is that the in-store experience is rapidly getting to be as bad or worse.
The question is: can I find something equivalent for
less cost. My experience has been, with sufficient
searching (and yes, there's a time cost to that), yes,
I can.
Surface Clothing is closest to being Outlier at a lower price point.
You're right that there's noone else in direct competition, but they do have siblings in converging verticals. You should definitely look at Rapha, nau, and Bonobos, each of which overlaps in a different way. You should also look for RRL shirts in boutique fashion stores, they've got some insanely great merino button-up shirts (they're never listed online).