Is this a true choice? I am choosing convenience, if I need freedom later I can pay the price and get it. For example, I am developing on the closed Google App

Is this a true choice? I am choosing convenience, if I need freedom later I can pay the price and get it. For example, I am developing on the closed Google App Engine. If what I'm doing becomes successful and I hit limitations of the platform, I can reimplement the whole thing on an open source stack. But I don't want to pay that cost up front. Edit: Thanks for clarifying what Stallman offers.