It depends on the landlord and type of place. A long-term lease comes with additional considerations for the landlord, mostly in terms of a long-term lease often requiring slightly different legals and a loss of optionality.

While I've had landlords that were not prepared for a long-term lease, I've never had an issue getting one anywhere I've rented. I've also had this work against me i.e. rents actually decreased halfway through the contract.