I'd argue it is largely true now. If the free version is GPL'd, students can easily use it, but a lot of folks won't want to develop in something that has what is likely to be a high commercial cost. I'm still curious how much they would charge me to use the commercial version to write some scientific software that will likely have no customers. Would they be lenient and not try to charge what they would for a developer at Boeing? I'd love to know as Ada and Spark just seem really cool.