But you just hit the nail on the head: "Solo software engineer can't create on of these now".

The current boom in AI and the cloud/social media boom in the recent decade have required ungodly amounts of capital for their resident companies to get off the ground. It's no longer a creative endeavour that basement hackers can participate in. In many ways it is toxic to the original nerd/hacker ethos by shutting out newcomers to the field and increasing wealth inequality, hence the hostility you now see on HN.