Trailheadx20 highlights

Custom offline functionality i.e Briefcase Pilot should be available in the next winter21 release

Code Builder available as Pilot feature
Code Builder is a new, web-based dev environment optimized for Salesforce(no software to install like VS code on desktop)
dev blog -
https://developer.salesforce.com/blogs/2020/06/introducing-code-builder.html
admin blog-
https://admin.salesforce.com/blog/2020/new-devops-center-is-awesome-for-admins

Salesforce Functions available as Pilot feature
Developers can write code in any language of their choice

Safe Navigation Operator will be GA in Winter21 release
No need to write heavy code for null check simply use the safe navigation operator( ? )

Architect Guide-
https://medium.com/salesforce-architects/introducing-architect-decision-guides-609ae5d7b5da

Recordings-
https://trailblazer.salesforce.com/sessions?eventId=a1Q3A00002Ihno1UAB#/session/a2q3A000001rVc7QAE

Trailhead in a Box -
https://trailhead.salesforce.com/en/users/strailhead/trailmixes/trailhead-in-a-box

Getting started
https://trailhead.salesforce.com/en/users/strailhead/trailmixes/get-started-with-trailhead-end-user

My Custom sfdconestop Trailmix
https://trailhead.salesforce.com/en/users/nayanakadiyala/trailmixes/sfdconestop