Practicality is a big part of the politics, but there's real politics at play as well. Different developers will have different levels of comfort with different

Practicality is a big part of the politics, but there's real politics at play as well. Different developers will have different levels of comfort with different tool chains, and different capacities to work outside their comfort zone. This is overly reductive, but here's an example: if you have 3 developers, and 1 will be twice as productive in F# and the others will be 10% less productive, it's probably practical sense to switch, but the 2 developers will resist it, and it may fail for political reasons.