I run all my dev environments under LXD. Even the IDE: full graphical Emacs (or Vim) over X11 forwarding over SSH. Host is Wayland, so security concerns with X are handled. WayPipe also works, but is jankier than X, probably because X, unlike Wayland, was designed for network transparency.

LXD, unlike Docker, doesn't play fast-and-loose with security. It runs rootless by default, and I don't allow non-root access to the LXD socket on host. Each container is a full userspace, so it's much more convenient to configure and use than Dockerfiles.

SSH from a container to a remote works transparently because I forward my SSH Agent. This is secure because my agent confirms each signing request with a GUI popup (on host).