Even if TD gets acquired, they will still need HQ buildings. Any acquiring company wouldn't shut down, or even move the necessary development/support functions. Services business would have to be sold first, or at the same time. Tech companies are more valuable if services are under 10% of total software revenue.
And if TD owns the RB buildings, it makes it an even more attractive target with valuable real estate assets on the books.
Reposted from @Xh9Kb2o-hcs