You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
as above, is a bash needed, ride natural trails around peaks, lakes and hebden
Depends what purpose you are using the bash for...do you need it to help keep the chain on? Then generally no. Do you need it to protect the chainring from knocks? Then yes
For XC/Trail/AM/ whatever you want to call it, the main issue for me is knocking unprotected teeth off a chainring. I used to run a bash with 2x9 but it's not really an issue if you're running 1x10 since the chain is always there to protect the ring. Obviously a bash will protect against bigger impacts but for the odd scuff I don't bother with the added weight.