Hi,
I would first say that adding so many attributes to the same entity is definitely not a good practice and should be considered for proper architecture.
Better to have a couple of discussions to rethink for how you can break it into sub-entities to have a classified structure.
Moreover if you add so many attributes to the same entity, then you will be requiring couple of plugins or some temporary fields to store and utilize those fields. If you reach the threshold by the required fields only then what you do when you will need
more fields to carry out operations for existing fields.
As an addition, consider retrieving large amount of data will be degrading the performance of the whole system.
I hope this helps.
Thanks & Regards,
Anubhav Bajpai