Layoffs are common very large companies because of how they operate.
Although they start as innovative companies once they hit a certain size threshold internal inertia prevents any significant innovation.
In order to maintain growth they must buy smaller innovative companies and capitalize on the innovation using their vaster resources.
After they have sucked every last bit of money the purchased innovation, they layoff employees they purchase with the innovative company and all those they added in its ramp up.
They then go on the hunt to purchase the next smaller innovative company.
Mega corporations are a parasite on the economy.
Please do not cut off the leaf. Removing a leaf before it is completely brown inhibits it’s growth. Plants relocate mobile nutrients from older/dying leaves to newer ones. Be patient and let the plant do its thing.
Browning in the middle of the variegation is usually due to a drastic change in light. This causes what is essentially a sunburn.
A few tricks from way to many decades growing them. They like direct morning or evening sunlight for 3-4 hours. Watering - completely saturated the pot then allow it to dry out (I water mine only once a month or two). Fertilizer - they do best with a fertilizer with a 3:1:2 NPK ratio. You can give them a bit extra K when they are putting out a new leaf.
Do not move the plant if possible. Rotating them is a great way to mess them up and get sunburn.