I know there is a limit of 110 custom fields that can be added but is this number for Contacts and Companies separately (i.e each can have 110 custom fields) or Contacts and Companies together (i.e 55 custom fields each)?
If they are together, can the allocated number be transferred to the other category? I.e, if I don’t use the Company fields and would need more Contact fields, can I use the allocated 55 Company custom fields as Contact fields instead?
As far as I know you have no limit to the number of custom fields.
Keep in mind that one more custom field will make SQL queries (when updating segments) more complex.
I suggest you create only the fields that are necessary for your marketing campaigns.
Indeed, the limit is related to the SQL database.
There is always a limit in a computer system.
For the time being, the limit announced in this topic has been pushed back in the latest versions of Mautic, I believe.