Been doing some homework on the implementation of SAFE Validators.

The warm up / cooldown period is 3 epochs, each being around 2 to 3 days each.

If 50% of all coins get staked (as with Solana and the previous SafeNodes) then the annual return will be:

Emissions: 1,440 x 4 = 5,760 SAFE / day

Staked 50%: 15M SAFE

Earnings per SAFE Staked: 5,760 / 15M = 0.000384 x 365 = 0.14 SAFE per annum

Return: 14% per annum on whatever SAFE you delegate to a Validator

These figures are approximate, but I think they're close.