This a summary answer.
The free software for doing this is available and is very productive.
Sector rotation, I believe, will come to the fore in the next few years.
Right now the better emerging software has several features that are helpful in the management of using fundamental data for some reasons and then the subsequent need to use technical data as trading/investment is on the table.
People do mostly focus on inventing as is seen here.
At some point though a person's knowledge and skills base does kick in.
Sectors rotate in their prominence for an assortment of reasons.
The combo of reasoning and the information sets is where the rubber meets the road.
Both of these facets usually cost money to either have or operate. I do not think that will change and it seems fair to me as well.
All the reasoning stuff is available as a drag and drop thing if you only want to use certain FA and TA type data and information.
The data bases can be subscribed to and kept current as well.
It is probably best to get a supplier for each who is a specialist. or you can use public information from any number of sources.
Today sector work is in the same state as platform performance. No one platform is sufficient for making money.
For me it comes down to having to do a lot of importing and exporting to follow what I have done manually in past decades. I think things will get convenient in a few years, though.
The replacement of the current strategies of mutual funds and hedge funds will come down to sector rotation once they catch on to making money as a goal. Sector rotation can handle unlimited funds.