I would not use it as an OLTP system. The reason why is simple:
lakehouse is heavily dependent on 'big data file formats' like parquet, delta lake, orc, iceberg etc.
These are typically immutable.
In an oltp system you have to do a lot of small synchrone updates which is cumbersome in a lakehouse (because of the immutability of the files).
I don't see the added value (compared to an RDBMS) using a lakehouse for OLTP.
For OLAP workloads: totally.