A simple snippet that attaches the local character to moving platforms that move without physics.

StickyPlatforms.lua

local STICKY_PLATFORM_TAG = "StickyPlatform" 
local DISTANCE_TO_CHECK_BELOW = 15

local CollectionService = game:GetService("CollectionService")
local RunService = game:GetService("RunService")
local Player = game:GetService("Players").LocalPlayer

local lastPlatformCFrame = nil
RunService.Heartbeat:Connect(function()
	if not Player.Character then
		return
	end
	
	local characterPivotCFrame = Player.Character:GetPivot()

	local platformRaycastParams = RaycastParams.new()
	platformRaycastParams.FilterType = Enum.RaycastFilterType.Whitelist
	platformRaycastParams.FilterDescendantsInstances = CollectionService:GetTagged(STICKY_PLATFORM_TAG)

	local raycastResult = workspace:Raycast(characterPivotCFrame.Position, -Vector3.yAxis*DISTANCE_TO_CHECK_BELOW, platformRaycastParams)
	if raycastResult then
		local platformCFrame = raycastResult.Instance.CFrame
		if lastPlatformCFrame==nil then
			lastPlatformCFrame = platformCFrame
		end

		local platformRelativeCFrame = platformCFrame * lastPlatformCFrame:inverse()
		lastPlatformCFrame = platformCFrame
		
		Player.Character:PivotTo(platformRelativeCFrame * characterPivotCFrame)
	else
		lastPlatformCFrame = nil
	end
end)