Yes, antivirus is still required but as long as you have decent common sense, the built in antivirus and antimalware on Windows (sometimes known as Windows Defender or Windows Security) is good enough for most users (the only use case where I can see commercial AV solution being of any use is for compliance checklists). Chocolatey, Winget, and Scoop are all good options for installing software.

Oh and you will love Powershell 7 on Windows Terminal. It is a delight and a breath of fresh air if you ask me.