I understand that getting out is many folks thing-hell I used to do it before Zwift.
but £13.99 is absolutely nothing per month. If you stop once on a ride you can easily spend a tenner with a coffee and cake/fired egg sarnie.
You can ride anytime of the day-your schedule, every day. Rack up hundreds of miles of quality riding.
Then the savings on bike parts, chains, cassettes tyres, inner tubes. The mony saved on that and outdoor kit especially winter kit has truly paid for my whole indoor setup. New chain every 3rd year is all I generally spend