Ardour is very high quality for FOSS. There are many distros that include a free version of Ardour. Ubuntu Studio[1] for instance, and then there are distributions where installing it is an apt-get[2] or yum[3] or whatever[4] away, and paying for it is optional.
[1] https://ubuntustudio.org/2022/11/ardour-7-1-backports-availa...
[2] https://packages.debian.org/search?keywords=ardour
[3] https://packages.fedoraproject.org/pkgs/ardour7/ardour7/
[4] https://archlinux.org/packages/extra/x86_64/ardour/