Stratum 1 support doesn't require a lot of different hardware, arguably it requires less: you need only a PPS device; which has become increasingly generic due

Stratum 1 support doesn't require a lot of different hardware, arguably it requires less: you need only a PPS device; which has become increasingly generic due to the kernel support needed for precise timestamping. (okay sure, you also need to initially name the second, but you can have another NTP server do that).