Check out this observation from DHH about where Basecamp finds the most $avings:

We spend more money on the 15-strong developer team at Basecamp than our entire operations budget! If we make that team just 15% less productive, it’ll cost us more than everything we spend to run Ruby and Rails at Basecamp!

Only 15% of the Basecamp operations budget is spent on Ruby

TLDR: When we focus on tech stack savings, admin overhead savings, etc. we are fretting around the edges; the big savings in your biz are likely found in human effectiveness.