By 2024, the HVAC market is expected to reach a worth of $136.5 billion around the world, making it one of the most in-demand markets. An increase in the need for commercial HVAC can also be seen in its compound annual growth rate,
For the period 2019-2024, the HVAC service market has the potential to grow over 6% however due to the gap in demand and supply of skilled technicians, the growth might be restricted.
All these factors should be taken into account. A risk-aware Windows user can probably survive without any anti-virus software at all. I ran Windows XP for a year to try to prove it.