Tags are being phased out. What do I use now to group items for reporting purposes such as Utilities, Maintenance & Repair, Venue Rental Expenses in one report?

I used to run reports which included all Tag Groups and associated tags with detail info. I don't want to continue using tags if they are not going to be supporting in the future. Custom Fields does not help. I don't want to create a report and manually select all accounts and group them when tags does this for me currently.