As far as we know, "the customer support people will continue to help people troubleshoot the product". And "if someone would like to purchase it, they will still be able to". You need to contact the Sales team to confirm.
It's not listed in the product pages any more though. It is no more included with either VEGAS Pro/ Pro Suite or VMS Platinum/ Suite AFAIK.
I hope they keep it as a legacy product. It was one of the last remaining programs from which you could make a DVD. It might seem like DVDs are dead, but you wouldn't know that from looking at my living room. For independent filmmakers and others, DVDs are still a great way to promote your work off-the-grid, self distribute, and promote whatever you want without the fear of being censored by online streaming, which is full of restrictions. Adobe killed Encore several years ago, and as long as DVDA is solid (and it is), I would hope they keep it somewhere on the shelf.