In many parts of the world the grid is a combination of unreliable or not there at all. And the required level of investment to fix all that is at least short term not keeping up with the increase in demand. So, things are getting worse for people dependent on the grid. And where grids are actually available, they aren't necessarily cheap, which incentivizes people that use a lot of power to invest in alternatives. You see this with e.g. companies exploiting vehicle chargers. They all end up installing solar panels and investing in electricity infrastructure rather than just paying per kwh to their local grid provider. The grid is a last resort for them. This is going to be true for any business where energy is a big component of their cost.
To get reliable and cheap power, people have to invest in their own generation. That's still expensive but increasingly more feasible and critical for especially small businesses. If you run e.g. a small shop and you have perishable goods in a fridge in a tropical country and the power goes out, you basically have a lot of melted / rotten goods after a few hours. Not great. If that happens a lot, your business dies. In the same way, having the AC on or off in a hot country can mean the difference between having your place full of customers or not. It's not optional. If grid power is only available a few hours a day, your business is at risk unless you fix a more reliable supply. Many grids in e.g. Africa are very unreliable and don't have enough capacity.
In many countries people are still relying on generators for this but increasingly solar and batteries are becoming a viable alternative. The upfront cost of this is a big obstacle for many smaller businesses. As is the availability of components. But generators and fuel are also not free. And they break down and need maintenance too. And the exhaust fumes cause health issues.
However, solutions in this space actually have a value and return on investment. So, providing lines of credit for this is actually something that is potentially a profitable business and not just charity. Plenty of entrepreneurs in Africa, the Middle East, parts of Asia, etc. that could use that to bootstrap their businesses and would be able to pay back loans with interest.
I'd say micro grids will be a reality long before, if ever, people figure out cheap, reliable grid power in many of these places.