Last year around this time, Parallels offered a discount to upgrade to v15. A few weeks later, v16 came out. I wrote to support saying that Parallels knew well that v16 was imminent, but hid this from their users. I asked for a discounted price to upgrade to v16, but was rebuked. Now there is a promotional price to upgrade to v16. Is this another commercial trap from Parallels, with v17 about to be released?