Posted on 25 February 2019 at 12:12 UK time
The simple answer to this question is: YES.
Dynamics 365 Business Central has the exact same code base as Dynamics NAV, it was created using the basis if NAV and so, it is still NAV, just with a few powerhouse upgrades and a brand new look.
So, if the functionality is almost the same, why upgrade?
User Licenses - Business Central is only licensed as a Named User, and Concurrent Licensing is not an option.
Subscription Model - Just as for NAV, there is the offer for both perpetual and subscription licenses for Business Central. Because Business Central has named user licenses, under the subscription model, your monthly fee is based on the number of users you have.
Customisation and Integrations - A transition to Business Central may require additional effort if you or your partner have developed customisation or third-party integrations for your NAV solution. Business Central uses a different, more cloud-compatible development platform for customisation and third-party product integrations than NAV does. This means any NAV customisation or third-party integrations you would like to continue using in Business Central may need to be redeveloped on the Business Central development platform. As part of your transition, you’ll need to evaluate your customisation and integrations and determine which ones are still required or cost-effective to redevelop for Business Central.
Making the switch to Business Central is not so different than any other NAV upgrade, instead of upgrading to a newer version of NAV, you’ll transition to Business Central.
When upgrading, all pre-existing full users (those that you purchased before 1st October 2018) will become 2 full Named Users. Any additional full users purchased after 1st October 2018 will transition to 1 full Named User.
As already mentioned, customisation's and personalised integrations will need to be re-evaluated as it is likely they will need to be re-worked in order to function correctly in Business Central.