Key costs like hosting are way cheaper, back then you probably had to rack server in a data center, now you can deploy a free/cheap PaaS with a free/cheap database while you find PMF.
Marketing is way cheaper, social media is a grind but it's a game you can play to acquire users/customers for _free_.
There's more stuff going on online, more people, more businesses, more everything. Think about the entire "creator economy", other bootstrappers, Shopify sites, etc.
Yeah some stuff has gotten harder, more platforms, higher UX standards. But on the whole I'd rather bootstrap in 2023 then 2010.
Check in with me in a year though.