What happen if I dowgrade to free account with my CRM ?

What happen if I dowgrade to free account with my CRM ?

Thanks for opening and following up this topic.
I have a similar question :

I have been on a paid account for 2 years.
All my team was also on paid accounts.
Down the company is dowgrading.
There is only me left in the organisation.
I am still paying 35 € / month

I would like to go back to free account.

Here is my question:
> Is there anything I will loose if I do so ?

Thanks a lot in advance
Laure