@Suvarna Joshi I work for a home builder in Tampa Fl we borate treat all of the wood we use in direct contact with concrete on our home. Block on bottom, wood frame on top. Just recently got subterranean termites on a duplex we built 2/3 years ago. Have been getting it treated quarterly. The warranties are good to have when you find those mud trails.
In Florida they are a real problem, not sure about your market. Most termite companies will warrant against subterranean but not dry woods, as they fly and they cannot control that. If it’s common in your area then yes it is worth it IMO to have that peace of mind that it will be taken care of professionally when they do come.
My personal duplex, 100 yr old wood frame home, had evidence of dry wood termites and I refused to get professionals involved. Did DIY methods. Trenches around the house, Termidor between the studs etc. Still came back. Set up orkin to handle everything for $300/yr. They sprayed in the attic, UNDER the crawl space, between all the studs and they come out for free if any evidence is found between services. The peace of mind to have that off my hands is well worth $300/yr.