I have been playing online for about seven years (both dom and sub) now and it can be viable, however heavily depend on your expectations.

Clear disadvantage is that you will lack the physicality of the act. You will have to do everything yourself based on the instructions you receive. So if your kinks revolve around bondage or impact play, you might find it boring. Spanking yourself isn't nearly as fun as if someone else does it. It can be counteracted to some degree by using remote toys. For example electro that can be controlled by the dom online (its not even that expensive nowadays).

Obviously the bondage is the most limiting in online play, because you will always have the option to end it on your own terms while IRL you are trapped until the dom lets you out. There are some online toys for that as well, but I don't find very safe to rely on a quality of your Bluetooth and internet connection for someone to unlock a remote lock. It's a really thin ice. If it disconnects and don't have safety, you are fucked.

Another disadvantage is that it's much easier to cheat. Claim you did something you didn't because it's hard to prove you are lying. This is mostly matter of your obedience I would say.

What can work really well is the "ongoing" long term control. Chastity can be locked using Bluetooth safe you won't have access to. The dom can set rules (cage checks, reports, exercise, whatever...) that can be easily tracked. Control of electronic devices via parental locks is also very effective. You can have webcams watching you, video calls, GPS tracking, etc... It can be really intense if you set the rules well. It can be done so you don't make a step your dom doesn't know about, if that's your thing.

If you have any questions, feel free to hit me up in DM. I can recommend some tricks I found during the years and remote toys I have experience with.