All are the disadvantages of cast restoration except:
Disadvantages

In the restoration of a small carious lesion, an inlay is not very conservative.
Relay on the bulk of the buccal and lingual cusps for resistance and retention form (wedge the cusps).
Number of appointments are more.
Necessity for a cementing medium.
Not conservative
Less number of appointments
Relies on the bulk of tooth structure for resistance and retention form
Necessity for a cementing medium