There's not a whole lot the Apex can't do. You just need to research what your trying to accomplish. Yes it can control a Jebao, but you'll need a different cable to connect it to a full Apex or VDM module. It is not wifi enabled. You need a wifi adapter. Netgear makes one. There's probably a 1,000 ways to set up an ATO, but for all intents and purposes it can control an ATO by either time or float switches. The ladder would require a breakout box.
Other than controling nearly all of your equipment, the biggest benefit from the Apex is information and safeguards. For example, you can monitor temp, conductivity and pH. It's not so much that we NEED to have a continous stream of that data, rather they offer us the ability to program safeguards.
For example, heaters fail all the time, sometimes in the on position which can cook a tank. When the heater is plugged in to the Apex you can program it to cut power to the device at a certain temperature. Furthermore, if the tank temp is too high you can have it cut off non-life support equipment like lights.
Or for more examples, I use a gravity fed ATO, I have a number of safeguards in the event the float valve fails. 1) A float switch in the sump that would close a solenoid valve if the water level is too high, 2) if that failed I have programmed safeguards that if the ph and/or conductivity drops to a certain point it will close the solenoid. This type of programming can and should be applied to a number of different equipment like dosing pumps and reactors. I also have float switches in every body of water to alert me or turn off equipment.
There's other things like a leak detector that can be the difference from a good day, to holy ****, "I'm going to kill myself!" For example, last week my DIY leak detector saved the day. My 2 year old managed to circumvent the child lock and proceeded to tip over my kalk drip. Instantly the alarm went off and my phone received a text message and I was quickly able to rectify the situation. Now it looks like I'll be installing alarms on my cabinet doors.
So, ultimately safeguards are the biggest benefit to insure you don't crash your tank. The second is not having to manually do certain tasks.