8.5Mb is a little too much for editor named micro. Whole DD-WRT/OpenWRT Linux Image is twice smaller.
However things are starting to get better: https://blog.golang.org/go1.7-binary-size.
If you're on macOS, try running $ otool -L some-go-program, or on linux:
$ ldd ./team-service
linux-vdso.so.1 (0x00007ffe492af000)
libpthread.so.0 => /nix/store/9xsjqbsldr86vvs7p5ps4qlkjv9dhc0k-glibc-2.23/lib/libpthread.so.0 (0x00007f47ef267000)
libssl.so.1.0.0 => /nix/store/v9mq9iv2sg017r7i0fpw8qlifvlpvlks-openssl-1.0.2h/lib/libssl.so.1.0.0 (0x00007f47eeff6000)
libcrypto.so.1.0.0 => /nix/store/v9mq9iv2sg017r7i0fpw8qlifvlpvlks-openssl-1.0.2h/lib/libcrypto.so.1.0.0 (0x00007f47eeba4000)
libc.so.6 => /nix/store/9xsjqbsldr86vvs7p5ps4qlkjv9dhc0k-glibc-2.23/lib/libc.so.6 (0x00007f47ee803000)
/nix/store/9xsjqbsldr86vvs7p5ps4qlkjv9dhc0k-glibc-2.23/lib/ld-linux-x86-64.so.2 (0x00007f47ef484000)
libdl.so.2 => /nix/store/9xsjqbsldr86vvs7p5ps4qlkjv9dhc0k-glibc-2.23/lib/libdl.so.2 (0x00007f47ee5ff000)My observation was around the use of the PC's special keys used in "generic" editors because the authors of those editors have chosen to assume that everyone it typing on a keyboard that matches, or emulates, the 101 or 108 key keyboard that the PC made standard.
No, it's not as small as Nano, but I have a hard time getting my hackles up over a single binary I can download in under a second.