Well as baby boomers are drifting into the sunset over the next 20 years or so, any business in the death industry should see a major increase in volume and revenue. I expect your replacement to face workloads you've never seen before as a result. Then I expect the spike to flatten out and return to a somewhat normal average.
I do see some major changes coming to your industry. Generation Y (millennials) and the Generation Z after them seem to have the mindset of waiting to have children in their late 20s to early 30s. That's 10 years later than the WW2 generation and baby boomers on average had their children. And if Gen Z carries on the current Gen Y trend of having less children on average than past generations, then expect another tweak to the norm. Also.... it has been my general anecdotal observation that people are choosing cremation more and are increasing in the mindset that they need no plaque, headstone or monument to remember them. The attitude of simply sprinkling their ashes somewhere they want to be laid to rest or want to be remembered at has exploded over the past years.
Part of that change in attitude came with the rise of environmentalism where the mindset is at reducing our global footprint. They think it's silly to spend money to take up space in this world with a physical object with their name on it, that nobody will likely visit beyond those friends and family that knew them. After that, they are basically objects that clutter our world until some future generation decides to remove them. I'm of that mindset too (minus the global footprint angle), although I'm not an environmentalist. I just don't see the point. People's memories of me matter far more than visiting an inanimate object with my name on it, that nobody will care about in 100 years unless I had some big impact to my community and the world at large.
The longest stretch I've done was 23 days straight of work without a day off. I feel ya! Just be happy retirement is right around the corner. But my advice to you is to keep some level of purpose in your retirement. Take up a hobby or activity that keeps both your mind and body in shape. People tend to live longer and happier lives that way.