Is there potential for AI and robotics to mitigate the impact of this trend by filling workforce gaps and maintaining or increasing productivity? 

For LTRs, the 1% rule is a good starting point, but also consider the property's location, market trends, and economic factors for potential appreciation.

Generally speaking, as crime rates trend down, the demand ratio often trends upward, but it is not a given. 

The long term trend is clear, upward.  

Assess historical data on property appreciation, rental income trends, and market stability.

I have noticed a trend over the pasts 10 years where more and more of the people have zero involvement in the day-to-day operations of the property and are only raising money.  

Chasing the latest “hot” real estate market, trend or location to invest in5.

How well do you understand the trends that drive the city real estate?

It has been slow moving trend, with ups and downs, but its encouraging to see a stable downtrend. 

For example, I try to rent to families and try for longer durations with renters that will take care of the place and also might put down roots with kids in school etc.Check crime stats, schools, population trends, big job suppliers, colleges, hospitals.