It's not about the 15 GB but there was a time where Gmail was new and fancy - and Google's slogan "Don't be evil" as a young and uprising company. As the market got saturated, the business model (or the direction) changed and it's not only Google, M$ also did reduce free space in OneDrive after many years some time ago.
"Don't be evil" was just the referral to this slogan and I don't care if it's 15 GB or 30 GB today as I choose to pay for the services these days instead of just relying on any free(mium) model.
Decades ago, bugs were placed by spies to listen to suspects. Today the suspects willingly opt-in by buying such a piece of e-crap dumb*ss "phone". Own fault. 🤷♂️😂