Basically yes. Vertical organization is the default fallback to organize ourself in groups, since it worked mostly fine in the groups of up to 150 people for most of our evolution.
How much months was this again, since they would have needed multiple times the internet in data amounts, just to have some progress? Sorry, but it's a bubble.
First create the HTML DOM, then beautify with CSS, then script stuff with JS for functionality you can't do with HTML and Backend.
And read up on HTML tags, please. There's too much div-only crap already. And better go basic than fancy; fancy is more technical debt that blows up (or leaks your users passwords) along the road
Don't listen to the naysayers, they never did a website from scratch. And the usual frameworks have gone complex to a point that learning them and adjusting them to your needs eats more time than creating a basic website from scratch, while your websites performance and accessibility tanks. Imagine, a button not working just because you blocked third-party scripts!