• requires a fair bit of post-installation configuration (suboptimal OOTB experience for newbies)
• Uses btrfs by default but comes with no snapshots or GUI manager pre-configured for system restore
• Less software availability compared to Ubuntu or Mint
• More likely to break than Ubuntu or Mint

Technically, Endeavour does have its own repos but they only contain a relatively small number of non-essential packages. But yeah, other than that it’s basically pre-configured Arch with great defaults.