I'd like to learn about the Tor network in terms of numbers, statistics.
Can I find out how many relays the network has and possibly where they are located?
Can I learn about roles the relays play in the network? For example, how many exits/guards/middle (or combination) are there?
Can I learn about individual relays?
Can I learn about how likely it is to use a given exit/guard?
Whenever you can keep track of users, can I find out how many people use Tor/used Tor? If possible even with where they are coming from and if they used vanilla Tor or a Pluggable Transport.
Can I learn about the performance of the network?
Can I learn if the network is in good shape regarding the network-documents that get published like the consensus?
Can this be done somehow, either with tools developed by someone or websites/service or manually?