The concern is here is clearly not the revocation of licenses. The cost of not just learning but becoming a professional user of a specific set of tools is ver

The concern is here is clearly not the revocation of licenses. The cost of not just learning but becoming a professional user of a specific set of tools is very high. Then later as time goes by being forced to either abandon these tools or to accept a different pricing model is - to many people - unfair and unethical.