£4,864 is a lot of money. Let's assume you work 225 days a year. This work out at £21.62 for each journey - to travel Anytime. For comparison purposes the cheapest Super Off Peak Day Return (that is heavily time restricted is £22.40)
Google maps tells me that if you were to drive it's about 72 miles each way. Depending on the fuel type and economy of your car (bear in mind you're unlikely to get top drawer economy driving in Central London) then you could expect your fuel costs to be at least £16 a day. You'd then have to factor in parking and the congestion charge before you even look at depreciation costs and servicing (I now we don't like these types of comparisons on this forum so I'll stop now...)
So £4,864 is a lot of money but when broken down to the daily cost you're actually travelling for the same price as a Super Off peak Day Return and cheaper than if you drove.
The real rip off here isn't the season ticket - it's the Anytime Day Return which is a whopping £58.80. I do pity anyone who has to buy this.