Evicting tenants for reasons not covered by Section 8

General Discussion

The forthcoming cancellation of Section 21 seems to leave landlords very little grounds for evicting tenants. The minimal reasons in Section 8 is apparently the alternative options. I don't know if I may have missed anything but are the grounds listed in Section 8 the ONLY reasons available to a landlord ? There seems to be a lot of potential 'what if's'  left out.  What is a landlord has become ill and cannot cope with managing the property even if he/she they are using an agent to manage the property. What if a landlord is emigrating and needs to sell up - does it mean he has to sell with a tenant in situ ? What if the landlord needs to sell a property for financial reasons ? what if, what if. 

Surely there must be some legal means of getting tenants to leave, even if it is an extended notice period ? Maybe the government is proposing new fixed term tenancies ? So someone going to work abroad for a few years can rent their house/flat out for a fixed period ?

If there is nothing in the pipeline it would seem that the cancellation of section 21 is going to make people think a lot harder about renting a property out - especially in the short term. Resulting in fewer rental properties available potentially.

I may have missed any discussions or advice on this topic so would appreciate info on where I need to go to read the article(s). I'm confident our government has made provisions in the new legislation for 'what if's'.