I cut the cord about 1.5 years ago and love it. We can pickup 39 channels with the OTA antenna. I was up to $200/mo with cable, DVR, and internet and now I am down to about $70-$80. I have 24 Mbps internet and it is just fine for streaming. The answer to your question is the convenience and importance of having TV versus saving some money.
Here is my setup:
All of the items (except the Roku) were purchased from Amazon. During weather events the antenna is not reliable but we just switch over to streaming.